Which statement best describes prehistoric hunter-gatherers?

The question is not complete and did not provide options to choose from, here are the options for this question I came across earlier;

1) They were experts at using their environment to meet their basic needs

2) The tools they made from metal helped them to survive

3) They domesticated animals to help with daily activities

4) They developed ways to bring water to their crops

The correct answer is “They were experts at using their environment to meet their basic needs”.

A hunter-gatherer is a human living in a society in which most or all sustenance is acquired by scrounging, as opposed to agricultural social orders, which depend fundamentally on tamed and domestic species.

well i'm late but i think its: b, c, and e

answer; i believe that the correct answer is (decreased)