Erosion happens when rocks and sediments are picked up and moved to another place by ice, water, wind or gravity.
Answer:
a.
b.1058 N
Explanation:
We are given that
Mass of each dog,M=18.5 kg
Mass of sled with rider,m=250 kg
a.Average force,F=185 N


By Newton's second law



b.By Newton's second law

Substitute the values

Hence, the force in the coupling between the dogs and the sled=1058 N
The answer looks to be "A" because Protein is used to regulate organs.