The pyramid of Japan is narrow at the base whic means low birth rate. Decreased death rates all less number of people to reach old age.
The working population is more compared to the children and old population.

The population pyramid of Kenya is broad at the base and narrow towards the top because:
(i) many children are born
(ii) a large percentage of them die in their infancy
(iii) relatively few become adults and there arev few old people

Death rate is an influencing factor of population change. Deaths are usually measured using the death rate i.e. the number deaths per 1000 people. When death rate is more than birth rate, it is a population decrease

Birth rate is one of the influencing factors of population change. Births are usually measured using the birth rate i.e. the number of live births per 1000 people. When birth rate is more than death rate, it is a population increase

The population pyramids are the graphical method to show:
(a) total population into male and femalei.es composition.
(b) age group from 0-14, 15-59,59 years and above.
(c) work force.
(d) dependent and productive population.
The shape of the population pyramid helps to know about the people living in that
particular country. The numbers of children below 15 years age-group are shown at the bottom and reflect the level of births.
The size of the top shows the numbers of people above the age-group of 60 years and reflects the number of deaths.
The population pyramid also shows that ho many dependents and working force/class there in a country.

Densely, favourable, natural, fertile

The Countries in Asia are China, India, Indonesia, Pakistan, Bangladesh and Japan

The distribution of population in the world is extremely uneven. Some areas are very
crowded and some are sparsely populated.
(i) More than 90 per cent of the world's population lives in about 10 per cent of the land surface.
(ii) The densely populated areas- The crowded areas are South and South-East
Asia, Europe and North-Eastern North America.
(iii) The sparsely populated areas-Very few people live in high latitude areas, tropical
deserts, high mountains and areas of equatorial forests.
(iv) Almost three-quarters of the world's people live in two continents, Asia and Africa.
(v) Sixty per cent of the uneven distribution of people stay in just 10 countries. All of them have more than 100 million people.

Bad effects of population explosion on our society are:
(i) A pressure upon resources as there are more people and their quick depletion.
(ii) An increased number of poverty-stricken individuals as little food is distributed among more people, then starvation. malnutrition or poor diet with ill health and diet-deficiency diseases would increase.
(iii) Loss of natural environment (forests and such) and loss of ecosystems because they are destroyed to make way for farming and urban developments to accommodate the rising population.
(iv) Irreversible loss of arable land and increase in desertification.
Population pyramid is also called the age-sex pyramid. Population pyramid shows:
(i) The total population which is divided into various age groups. For example 5 to 9 years, 10 to 14 years.
(ii) The percentage of the total population, subdivided into males and females, in each of those groups.
(iii) The numbers of children (below 15 years) are shown at the bottom and reflect the level of births.
(iv) The size of the top shows the numbers of aged people (above 65 years) and reflects the number of deaths.