What causes the doldrums to be calm winds? A. Trade winds from the north and south collide, pushing the air up.
B. Frequent storms bring heavy precipitation, pushing the air down.
C. Earth revolves around the sun, keeping doldrums stationary.
D. Mountain ranges provide friction, slowing the doldrums.

Texas’ gulf coastal plains are the western extension of the coastal plain extending from the atlantic ocean to beyond the rio grande. its characteristic rolling to hilly surface covered with a heavy growth of pine and hardwoods extends into east texas. in the increasingly arid west, however, its forests become secondary in nature, consisting largely of post oaks and, farther west, prairies and brushlands.