An epoch is longer than an era.
Answer:Physical systems differ from social systems because a physical system refers to systems that rely on a group of physical parts to perform a function. Examples of a physical systems are solar systems or even an animals digestive system. Social systems are systems like an ant colony, wolf pack, or a town.
Explanation:
I would select A because cells have to divide into smaller cells depending on where they are.
B, immense pressure causes the core to be very compacted and solid.
I think it’s called nutrients
