What is the cause of mechanical weathering?

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

What is true of sea slugs in these orders