Rosion is the same as weathering is always a destructive process happens more quickly in cold climates than in warm ones is the movement of sediment from one location to another

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

hope this :