An individual who promotes environmental issues most likely works in which field?
a. environmental law
b. environmental journalism
c. environmental activism
d. ecology

An individual who actually promotes environmental issues would most likely work in environmental activism: this is the field that aims to make some changes.

In contrast, environmental journalism would focus more on informing and environmental law on dealing with legal issues. 

c

Explanation:

B. Two or more individuals who share a set of norms, values or belief and have a certain implicitly or explicitly defined relationships to one another such that their behavior is interdependent.

Explanation: A group is simply composed of more than one person, and as such members of a group have something in common, it could be a behavior, attitude, like or anything which is common to all members of the group. A group usually possess a relationship pattern which may be lucid or very obvious and sometimes may not be known to others people outside their group that is they exhibit a a sort of positive correlation and as such members of the group exhibit a mutual dependence on one another.