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

You call the hard case that surrounds the soft parts of some animals the exoskeleton.
What do you call the hard case that surrounds the soft parts of some animals?

Seeds of a pine cone are easily carried by the wind and dispersed because seeds have wings.
Why are seeds of a pine cone easily carried by the wind and dispersed?

Rich in protein and nutrients, insects abundant group of organisms is being touted as an important human dietary source.

Rich in protein and nutrients, what abundant group of organisms is being touted as an important human dietary source?