The map shows ancient river valley civilizations. letter a shows the location of which ancient river valley? tigris indus nile euphrates

The correct answer on the test was Indus however there is not a map for me to look at so

it allows businesses to raise prices on basic goods. it allows consumers to spend more money on products. it increases government revenue to fund public projects. it provides more money for government assistance programs.

explanation:

we need the map to answer the question