Question

He works until he is tired. The sentence has

Noun Clause
Adjective Clause
Adverb Clause
No Clause

Answer 1

Adverb Clause

Step-by-step explanation:

An adverb clause is a clause that modifies/ adds meaning/ explaining a verb. So think of How?, Why?, When?, Where?, and To what extend?, Under what condition?

In this case, the sentence can be transformed to questioning form, "To what extend does he work?" and we'll get the answer, "He works until he is tired."

Answer 2

it has adverb clause= C i guess