4. What is Ecological Succession, and food chain ? Explain in your own words

The decrease of a certain good source.

"Ecological Succession" is essentially the observed transition phase in the overtime structure of the organisms of an ecological group.

"Food chain" is basically the direction of an ecosystem's energy flow.

Explanation:

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.