B. By using up less calories than you take
Answer: Darwin had stated in The Origin of Species that “all the organic beings which have ever lived on this Earth may be descended from some primordial form”,
Explanation:
Damage is caused to an ecosystem by adding fertilizer because some of the substances to the fertilizer is toxic or create bad reactions.
All the different plant populations make up the plant community in this swamp. The plants are part of a bigger ecosystem that contains many abiotic and biotic factors.
<h3>What is an Ecosystem?</h3>
An ecosystem may be defined as a place or an area that involves individuals of different species that live together and interact with one another for the purpose of food, shelter, and space.
In ecology, a community may be defined as a group of individuals belonging to different species that are living in the same area at a given time.
So, all the different plant populations make up a plant community.
Therefore, the community is the collection of all different forms of species but the ecosystem is the community has highly influenced by abiotic and biotic factors.
To learn more about Ecosystem, refer to the link:
brainly.com/question/7413811
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Should be A the newer layers are usually on top
