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

A frog develops (a/an) lungs as it changes from a tadpole to an adult frog.
Which of the following structures does a frog develop as it changes from a tadpole to an adult frog?

The sun delivers power to the chemical factory chloroplasts.
What delivers power to the chemical factory chloroplasts?

A(n) underwater earthquake creates a tsunami.

What type of earthquake creates a tsunami?