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

Example Input: Ocean ridges formed by marine invertebrates living in warm shallow waters within the photic zone of the ocean are called coral reefs.
Example Output: Ocean ridges formed by marine invertebrates living in warm shallow waters within the photic zone of the ocean are called what?

Example Input: The mesopause is at the top of the mesosphere.
Example Output: What is at the top of the mesosphere?

Example Input: Leaves export sugar to roots and other nonphotosynthetic parts of the plant through the veins.
Example Output:
How do leaves export sugar to roots and other nonphotosynthetic parts of the plant?