Analysis:

This question requires us to determine the correct form of the verb "swim" to fill in the blank in the sentence "This time tomorrow I ________ in the ocean." We need to consider the concept of future continuous tense in order to choose the correct option.

Solution:

Future Continuous Tense:

The future continuous tense is used to describe an ongoing action that will happen at a particular time in the future.

Formation:

To form the future continuous tense, we use the auxiliary verb "will" followed by "be" and the present participle form of the main verb (-ing form).

Example:

- I will be swimming in the ocean.
- She will be studying for her exams.

Explanation:

In the given sentence, "This time tomorrow I ________ in the ocean," the action of swimming is described as ongoing at a specific time in the future (this time tomorrow). Therefore, we need to use the future continuous tense to complete the sentence.

Options:

a) will be swimming
b) will have swam
c) none of the above

Correct Option:

The correct option is a) will be swimming.

Explanation:

Option a) "will be swimming" is the correct form of the verb "swim" in the future continuous tense. It follows the formation of the tense, using "will" as the auxiliary verb, "be" as the linking verb, and "swimming" as the present participle form of the main verb.

Option b) "will have swam" is incorrect because it uses the past participle form of the verb "swim" instead of the present participle form. The future continuous tense requires the present participle form of the verb.

Option c) "none of the above" is incorrect because option a) is the correct choice.