All external influences and factors that affect the growth and development of living organisms is ___________.

(a)

 Environment

(b)

Ecosystem

(c)

Biotic factors

(d)

Abiotic factors

The 'World Population Day' is observed on _____________ every year.

(a)

August 11^th

(b)

September 11^th

(c)

July 11^th

(d)

January 11^th

The statistical study of human population is ___________.

(a)

Demography

(b)

Morphology

(c)

Etymology

(d)

Seismography

The extraction of valuable minerals and other geological minerals from the mines, is ___________.

(a)

Fishing

(b)

Lumbering

(c)

Mining

(d)

Agriculture

Gradual increase of the earth's temperature by the Green house gases in the atmosphere is called ________.

(a)

Acid rain

(b)

thermal pollution

(c)

Global warming

(d)

Deforestation