Given the task definition and input, reply with output. Given a scientific passage and an answer, generate a question for the given answer.

Passage: In normal faults , the hanging wall drops down relative to the footwall. Normal faults are caused by tension that pulls the crust apart. This causes the hanging wall to slide down. Normal faults can build huge mountain ranges in regions experiencing tension ( Figure below ). Answer: ground tissue
What makes up most of the inside of a plant?