Which of the following sentences contains a linking verb?
a. pahom buys a farm.
b. pahom is unhappy.
c. pahom moves again.
d. pahom dies.

The correct answer is B. Pahom is unhappy

Explanation:

A linking verb is a type of verb that connects the subject and the predicate, different to other verbs they do not describe a specific or explicit action carried out by the subject, but the meaning of the verb is provided by the relationship established between the subject and the predicate, linking verbs include verbs such as feel, seem, be, taste, resemble among others. In the case of "Pahom is unhappy" the verb is "is" which is a form of verb to be that is classified as a linking verb, this can be explained as there is not a direct action but a link (is) between the subject (Pahom) and the Predicate (unhappy), this linking verb is the one that determines the meaning and thus, if it is linking a different subject and predicate the meaning changes. In this way, the sentence "Pahom is unhappy" is the one containing a linking verb (verb to be) as the verb just links the different parts of a sentence, but does not express a direct action.

the answer is:

apprehensive.