Choose the correct option to complete the statements given below:
Grasslands developed in many areas around ______________.

How many years ago did the grasslands develop?

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 ______________.