Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Ex Input:
In the tropics tradewinds are the prevailing winds called.

Ex Output:
In the tropics what are the prevailing winds called?


Ex Input:
Like skeletal muscle, cardiac muscle is striated.

Ex Output:
Like skeletal muscle, cardiac muscle is what?


Ex Input:
Ocean waves are mainly caused by wind.

Ex Output:

What are ocean waves mainly caused by?