This question tests your understanding of subject-verb agreement and verb conjugation in English grammar. Let's analyze the sentence structure step by step:

Step 1: Identify the subject
The subject of the first blank is "the sea" - which is a singular third-person noun.

Step 2: Apply subject-verb agreement
For singular third-person subjects (he, she, it, or singular nouns), we add "-s" or "-es" to the base verb in present tense. Therefore, "speak" becomes "speaks".

Step 3: Analyze the second clause
The second blank follows "who", which refers to "those" (plural). The verb should agree with this plural subject.

Step 4: Determine the correct verb form
For plural subjects, we use the base form of the verb without any conjugation. Therefore, "like" (not "likes") is correct.

Final Answer: The sea speaks to those who like to listen to it.

Related Grammar Concepts

Subject-Verb Agreement: Verbs must agree with their subjects in number (singular/plural). Singular subjects take singular verbs, while plural subjects take plural verbs.

Present Tense Conjugation:
- I/you/we/they → base verb (speak, like)
- he/she/it/singular nouns → base verb + s/es (speaks, likes)

Common Patterns

This sentence follows the pattern: [Singular Subject] + [singular verb] + to those who + [plural verb] + [infinitive phrase]