Correct answer: A. She suggested that he take a break.
This is the correct sentence because after verbs like “suggest,” we use the base verb — that means the verb in its simple form, with no “to” and no -s, -ed, or -ing at the end.
For example, the base form of:
takes is take
goes is go
studied is study
eating is eat
So in this sentence, we say:
"She suggested that he take a break." (base verb: take)
This structure is used when we talk about suggestions, wishes, or important actions. It's called the subjunctive, but your main job is just to remember the pattern:
suggest + that + someone + base verb
Why the others are wrong:
B. She suggested that he takes a break
Wrong because “takes” is not the base verb — it has an -s.
C. She suggested he to take a break
Wrong because we don’t use “to” after “suggest someone.”
D. She suggested he taking a break
Wrong because “taking” is the -ing form, not the base verb.
Summary:
A base verb is the verb in its simplest form: no to, no -s, no -ed, no -ing
Use this form after “suggest that”
"She suggested that he take a break."