Turn the given fact into a question by a simple rearrangement of words. This typically involves replacing some part of the given fact with a WH word. For example, replacing the subject of the provided fact with the word "what" can form a valid question. Don't be creative! You just need to rearrange the words to turn the fact into a question - easy! Don't just randomly remove a word from the given fact to form a question. Remember that your question must evaluate scientific understanding. Pick a word or a phrase in the given fact to be the correct answer, then make the rest of the question. You can also form a question without any WH words. For example, "A radio converts electricity into?"

Fact: Heating a filament is helpful for seeing in the dark.
What is helpful for seeing in the dark?

Fact: if a thermal conductor is exposed to the sun then that conductor may become hot.
What can cause a thermal conductor to become hot?

Fact: predator and vegetarian animals share some important physical traits.

predators and also what share important physical traits?