What is one reason early clans of hunter-gatherers are not considered civilizations?

They were together for food they weren’t building shelter or any of that And they were small groups. I don’t know if this is correct but it sounds about right

together getting food. NO BUILDING :) :)

HOPE THIS HELPS, please mark brainliest

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.

the correct answer is b, "fertility rates are increasing, so populations will grow more quickly in the future."