Which of the following descriptions about the organization of an ecosystem is correct?
a. communities make up species, which make up populations.
b. species make up communities, which make up populations.
c. species make up populations, which make up communities.
d. populations make up species, which make up communities.

The correct answer is "C".

A species is a group of related organisms that are usually capable of interbreeding and reproduce. A population is a number of organisms that belong to the same species who live in a certain geographic area at a given period in time. Finally, a community is an association of populations of two or more species that share the same geographic area at a particular time.

stone age, iron age, olden days, prehistory

explanation:

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before we work more on piecing ideas together to form summaries and paragraphs, we need to look at fundamental sentence construction. imagine you are reading a book for school. you need to find important details that you can use for an assignment. however, when you begin to read, you notice that the book has very little punctuation. the sentences fail to form complete paragraphs and instead form one block of text without clear organization. most likely, this book would frustrate and confuse you. without clear and concise sentences, it is difficult to find the information you need.

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