The central area of the intermountain region where water in streams is trapped and evaporates is called the colorado basin great basin northwest basin coastal basin

ANSWER:

The central area of the Inter mountain Region where water in streams is 'trapped and evaporates' is called the great basin.

EXPLANATION:

The rivers in the 'great basin' will not join into oceans or rivers. The streams and rivers in the 'great basin' form a pool or lake in the valley area and evaporates there. Some pools are sucked into the grounds. The water in the 'great basin desert' is too little to be pushed from the mountain region into the oceans or any big rivers.

Ba population changes in response to a change in environment