Which term describes a change in velocity? O A. Force
O B. Speed
O C. Energy
D. Acceleration

I'm sorry but i'm only grade

Putting salt in vinegar water

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.

B) movement of materials into and out of the cell