United and divided. Part a: which of the following identifies a central idea of a text

Im the following sentence, what is the complete subject . an old friend of mine is in the hospital

In the following sentence identify the words of the subordinate clause and name its type. we believe that christianity is the key to a better world.

What is the first step in summarizing a plot? restating central ideas and key details eliminating minor or unimportant details connecting ideas with logical transitions identifying important words and phrase