Answer:
A sentence fragment.
Explanation:
All sentences must have a subject, a verb, and an object.
He (Subject)
Giggled (Verb)
Missing: Object (Why did he giggle?
(He) (giggled) ( because he thought it was funny.) (Sentence)
(He) - Subject
(giggled) - Verb
( because he thought it was funny.) - Object , it told me why he giggled.
I believe they can. Adverbs may modify other verbs, adjectives, other adverbs, or even sentences.
ill be straight up, i didnt answer first but its A. be a lot cooler if i got brainiest
D. Severe i think. Hope this helps