What type of sentences are these. Please help me

In what for do plants utilize nitrogen? why do they need nitrogen?

Which statement best describes how the loudness of the sound affects the high-pressure region created by the sound wave? a. a louder sound has no effect on the pressure created. b. a louder sound means a high-pressure region that is higher. c. a louder sound means a high-pressure region that is not as high.

Is this mrna or rna need need the answer in a hurry