Imagine you were the manager of a national park with cheetahs. The cheetahs feed primarily on gazelles, while the gazelles eat grass. It takes one acre of grassland to feed one gazelle, and it takes ten gazelles to feed one cheetah. How much grassland do you need to support a population of 10 cheetahs? A. 10 acres
B. 500 acres
C. 200 acres
D. 100 acres

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.