Which is an example of physical weathering? a)bits of iron in rock rusting when exposed to oxygen and water

b)oxygen interacting with minerals in rock

c)rock breaking apart when it falls from a cliff

d)acid rain breaking down compounds in rock statues

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid