Final answer:
Environmentalism is a social movement aimed at preserving the natural environment, distinct from the interdisciplinary field of environmental science, which studies the interaction of living and nonliving components of the environment.
Step-by-step explanation:
The correct statement about environmentalism is that it is a social movement, not a scientific field of study. Environmentalism is concerned with the preservation and protection of the natural environment and is built upon the efforts of various stakeholders, including environmental scientists, but it is not itself a branch of environmental science. Instead, environmentalism utilizes the findings of environmental science to advocate for policy changes, promote ecological awareness, and drive sustainable practices. Environmental science, on the other hand, is an interdisciplinary field that studies the interactions between living and nonliving components of the environment, including the impact of humans on these systems.