Answer:
food chain - Food chain is the relationship between the individuals that constitutes a linear chain. In a food chain of an ecosystem, energy flows from one trophic level to another. There are 2 types of food chains, namely Grazing food chain and Detritous food chain.
food web - A food web is a graphical model depicting the many food chains linked together to show the feeding relationships of organisms in an ecosystem.
Answer:
A. Revise the hypothesis based on the results and use it to design another experiment.
I’m pretty sure it’s reproduction if not forgive me