Question

Match each item to the time it best represents.

1. humans began using stone tools
2. birth rates declined, and the average life expectancy increased
3. the world population totaled six billion people
4. the annual population growth rate reached its peak


the late 1960s
Industrial Revolution
Paleolithic Era
1999

Answer 1

No.1 is Paleolithic Era

The population 6billion is 1999 or Industrial revolution

I am confused...

Answer 2

1. c

2. b

3. d

4. a

Step-by-step explanation:

i don't know what to put here no explanation