(a) Hunter-gatherers chose to live in caves and rock shelters because these shelters saved them from heat, rain, wind and wild animals.

The hunters and gatherers needed a safe place for their survival, because climate was extreme and wild animals were a threat to life.

(b) Grasslands developed around 12000 years ago.

The Earth became warmer around 12000 years ago. The warm climate was good for the growth of grass.

(c) Early people painted on the walls of the caves.

The early people used to paint pictures of animals and humans on walls of their caves as a part of ritual.

(d) In Hungsi, tools were made of stones.

Archeologists found habitation and factory sites in Hungsi. In those factories people made tools from stones.

Fact: Hungsi is a town in karnataka, now it’s is known as Hunasagi. Early stone-age sites were found in Hungsi.