The branch of a willow tree utilized by specific species of insect obtain food as part of the species’ A
B
C
D
HELP

The correct answer is - A. niche.

Explanation:

A niche can be understood as the functional role or the employment of an individual organism or population fits in an ecosystem or community. It is the way an organism to behave or interact with the ecosystem.

In this case, the insect species obtain its food from utilizing the branch of the willow tree is explains its functional role and the way it interacts with other factors of the ecosystem.

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.