Koalas are Australian tree-dwelling marsupials that eat only eucalyptus leaves and have no natural predators. Which of these organisms do you think would have a niche similar to that of a koala? A. Panda
B. Bison
C. Bamboo
D. Raccoon​

A.  Panda

The giant panda, also known as the panda bear, is a bear native to South Central China.

panda's daily diet consists almost entirely of the leaves, stems and shoots of various bamboo species.

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.