Given a scientific question, generate a correct answer to it.

[Q]: Both fats and oils are made up of long chains of carbon atoms that are bonded together. what are these chains called?
[A]: fatty acids

[Q]: What is the main ingredient of mothballs?
[A]: hydrocarbon naphthalene

[Q]: Inside each lymph node is a honeycomb of connective tissue with spaces filled by what?
[A]:
white blood cells