# Why, since the ear of the earliest societies, have population centers sprung up in coastal regions and river valleys?

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## Answers

Because when it rains the rivers flood the valleys making the soil fertile.

If it helps you it is like making mother nature do the watering for you.

Since there is a water source near, and they're plants and animals.

May consider a group g=({0,1},+)g=({0,1},+)where ++ will work as the xor operator like we work in boolean algebra. note here, that ‘00’ and ‘11’ are not the usual 0 and 1 that we work with everyday. the elements are called ‘00’ and ‘11’ and may not mean zero (nothing) and one (single). ‘00’ is the identity for the given binary operator +, meaning that any element operated with ‘00’ gets us that element itself. for a set ss in g′g′ having more elements than just {0,1}{0,1} the values for a+b∈sa+b∈s, such that a∈s,b∈sa∈s,b∈s, have to be first defined, only then can you determine the value of 1+11+1. the answer could possibly have been 22 if oanswer is25,000

Cause of he different elevations hope this ?