How are humans and birds nervous system similar and different

the answer is d (apex) good luck : ))

synapse nervous system

the answer

b.) bowling ball

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.