Is a painful degeneration of movable joints caused by attacks on the joints by the cells of the immune system.
a. a sprain
b. osteoarthritis
c. rheumatoid arthritis
d. anterior cruciate ligament damage

Rheumatoid arthritis causes this. It's also a chronic disease.

A sprain is an injury to a ligament.

Osteoarthritis is a joint disease caused by the inflammation, breakdown and loss of the cartilage.

Anterior cruciate ligament damage is the injury to this ligament.

Hope this helps :).

c.rheumatoid arthritis

Explanation:

Rheumatoid arthritis is an autoimmune disorder that affects the joints and leads to their swelling and result s in a lot of pain. The joints of the hands and wrists are most commonly involved however there is a possibility that other parts of the body may also get affected which may lead to inflammation around the hearts and lungs along with a decrease in the red blood cell count. The cells of the immune system attack the joints in this disorder due to which there is inflammation and thickening of the joints.

In the air and in the lower fre ah water

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.