Answer:
D. Ecosystem
Explanation:
The living beings and the non-living conditions of a region interact with each other. They together make an ecosystem. In the given study, the aim was to restore the above-ground vegetation of the region. The "above ground vegetation" of the region is part of its biotic factors. The "below ground soil" is a component of the abiotic factors of the region. Since the study focused on both biotic and abiotic factors of the region, it focused on the ecosystem.
Fishing does not release fossil fuels.<span />
Less Child Abuse issues, Less Car deaths every year due to Drunk Driving, and especially better environmental conditions for families.
