What are some ways to cause mechanical weathering?

Mechanical weathering is the physical breakdown of fragmented rocks, due to changes in temperature, humidity and biological activity. Temperature When the rocks and minerals become hot, there are differences in tension in their structure.

i'm guessing this is from edg enuity so the answers would be, from top to bottom,

theodor schwann

matthias schleiden

robert hooke

rudolph virchow

anton van leeuwenhoek

b a mature ovary of a plant.