Question

choose the best answer. a valley with very steep sides is called a(n) _. estuary plateau plain canyon mesa choose the best answer. the geographic region bordering the gulf of mexico is called the _. central plains region coastal plains region central texas great plains region mountains and basins region

Explanation:

A canyon is a valley with very steep sides. The Coastal Plains Region is the geographic region bordering the Gulf of Mexico.

Answer:

1. D. canyon
2. B. Coastal Plains Region