Question

explain why nomadic tribes need to move from one place to another what are the advantages to the environment of this continuous movement

Answer 1

they do not have permanent house
their profession do not allow them to stay at a place
they r mostly herders means they have to find new place to graze their animals
they do not have field

Answer 2

because they had not learn agriculture they had to go around in search of food and shelter. the word nomads means no place.
advantages-----
●as for agriculture they had to cut a price of forest ,the nomads in the case had used to have only fruits and whatever available without cutting trees.