2. Of the following sentences, which is a comma splice? a. The greenhouse effect is a term.
b. Describing the process by which the earth's atmosphere traps heat.
c. The sun's rays heat the surface and atmosphere of the earth, in so doing they make possible photosynthesis.
d. Photosynthesis is a process by which plants use light to convert carbon and water into carbohydrates this process is essential to the life of plants.

C. The sun's rays heat the surface and atmosphere of the earth, in so doing they make possible photosynthesis.

Explanation:

A comma splice simply refers to a common grammatical error which occurs when a comma is incorrectly used to join two independent clauses together to make one sentence.

A comma splice can be found in "The sun's rays heat the surface and atmosphere of the earth, in so doing they make possible photosynthesis".

In this case, the comma is used incorrectly to join the independent clauses together.

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conclusions made on the basis of unstated or stated evidence are called inferences