Friction, gravity, and a normal force.
Maybe
Answer:
The movement of the object
Explanation:
Unbalanced forces will move the object in the direction the strongest force is going.
Image result for Where does respiration occur in earthworms Respiration I. Earthworms
In earthworms there is no specialized organ to do respiration. So, in earthworms respiration process takes place through its moist, thin and highly vascular skin. The oxygen gas absorbed by the skin diffuses into the blood and transported to all the cells of the body.
