I think the answer is noun.
Answer:
The water must be heated.
Answer:
Hey mate, here is your answer. hope it helps you.
Explanation:
In 1995, a person made ❌ the ❌ first solo crossing of ❌ the ❌ Pacific Ocean in ❌ a ❌ hot-air balloon.
A subordinate clause is part of a sentence that would <u>not</u> make sense on its own. For example
The cat was tired, <u>as he always ran around the field</u>
The part in bold is the main clause
and the part underlined is the subordinate clause