Complete the sentences:
(a) Hunter-gatherers chose to live in caves and rock shelters because ————————.
(b) Grasslands developed around ———————— years ago.
(c) Early people painted on the ———————— of caves.
(d) In Hunsgi, tools were made of ————————.
NCERT Class 6th Social Science History - Our Past 1 Ch 2. On the trail of the Earliest People?