A and R are correct and R explains A

A and R both are incorrect

(i) Hand axes and cleavers are the important tool types of the Lower Paleolithic period.
(ii) These tools fitted with a wooden and bone handle. They were used for cutting, piercing and digging.
(iii) The people of this time also used hammer stones and spheroids. The quartzite pebbles and Cobbles were chosen as raw materials.

(i) Animal domestication developed as part of symbiotic life.
(ii) Dogs may have been domesticated first.
(iii) Friendly animals were gradually domesticated sheep and goat were domesticated around 10,000 BC in South West Asia.
(iv) Oxen were used in Sumerian civilisation for tilling the land.
(v) Mehrgarh in Pakistan has evidence of sheep, goat and cattle domestication in the Neolithic period.

1. In Megalithic period people buried the dead bodies with grave goods in the cists.
2. Urns or pottery jars were used for burning the dead and also they used sarcophagi made of terracotta.
3. Dolmens, table like stone structures were erected as funerary monuments. Menhirs pillar are like stones erected as part of the burials or memorials.
4. Port holes are holes found in the cists and dolmens on one side.

(i) The people of Middle Palaeolithic culture were called Neanderthals.
(ii) They buried the dead people systematically.
(iii) They were the first human ancestors to mourn death properly and bury the dead.
(iv) They did not have needles, sewn clothes and warm houses essential for survival in colder climates.

(i) The history of humans is closely related to the history of the earth.
(ii) The earth contains geological, archaeological and biological records of historical times in its upper layers.
(iii) They are important for reconstructing the history of the earth and various living organisms.
(iv) The fossil bones of the human ancestors are embedded in the earth's layers.
(v) Palaeoanthropologists and archaeologists excavate the soil and rock layers on the earth and extract evidence about human ancestors.
(vi) These layers and the fossils are scientifically dated to study the various stages in human evolution and prehistory.
(vii) Through the gathered evidence they attempt to understand the evolution of human history and developments in a chronological order.·
(viii) The earth was formed approximately 4.54 billion years ago.
(ix) Gradually conditions emerged for the growth of organisms. Then plants and animals came into being and thereby foundation was laid for the evolution of humans. The long span of time in earth's history is divided into eras, periods and epochs by the Geologists. Thus the history of humans is closely related to the history of the earth.