Question

........... depends upon the principal clause for its meaning and begins with subordinating Conjunctions.​

Answer 1

Answer:

dependent/subordinate clause.

The dependent clause has no meaning itself. It always relies on the principal clause to be meaningful.

Answer 2

Explanation:

This Clause is the main part of sentence. As it contains the subject as well as the finite verb and the object, it can make complete sense itself. It does not have to depend upon any other Clause.