Question

what is coordanating corrrlative and subordanating conjuction

Answer 1

Correlative and subordinating conjunction are the kinds of conjunction which connects words. Example of correlative conjunction -Either you or your brother has done this. Here, either and or are the conjunctions.
Example of subordinating conjunction - Ram is happy because he has passed the exam. Here, because is the conjunction.

Answer 2

Subordinating conjunctions connect independent clauses and dependent clauses, which have very different functions. Coordinating conjunctions and correlative conjunctions, on the other hand, connect words and phrases that carry equal weight in the sentence.