Should I write seek or seeks?

. . . which is a group of professionals
who seek/seeks. . . .

Who is doing the seeking?

The whole group? Then use "seeks."

All the professionals? Then use "seek."

Thanks! Now, I understand with your explanation.

To determine whether to use "seek" or "seeks" in this sentence, we need to consider subject-verb agreement.

First, we need to identify the subject of the sentence. In this case, it is "a group of professionals."

Next, we need to determine whether the subject is singular or plural. In this case, "group" is singular.

Finally, we need to use the appropriate verb form based on the subject. Since "group" is singular, we should use the singular verb form, which is "seeks."

Therefore, the correct sentence would be: ". . . which is a group of professionals who seeks. . ."