Some life forms move so slowly that their movement cannot be detected by normal observation. The best way to determine any movement is by placing a mark at some point, and observing any change in position from it. Why is this true?

The life form returns to that mark.
The mark is a reference point.
The mark is a standard unit.
The mark makes measuring convenient.

Answers

Answer 1

The mark is a reference point.

Answer 2

Answer:

The mark is a reference point.

Explanation:

EDG 2020


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