The first one could be "care".
The second could be "rest".
A megalopolis is B. a series of almost continuous metropolitan centers with urban functions that exchange flows of people and goods with the surrounding areas and the rest of the world. An example is the Tokkaido Megalopolis in Japan.
Differences between compound and compound complex sentences:
A.). Compound Sentences: ==> A compound sentence has two independent clauses. An independent clause is a part of a sentence that can stand alone because it contains a subject and a verb and expresses a complete thought. - Basically, a compound contains two simple sentences. - These independent clauses are joined by a conjunction ==> (FANBOYS)
Subject + Verb + Object (For, And, Nor, But, Or, Yet, So.).
Subject + Verb + Object; Subject + Verb + Object (Conj., Adv.). Subject + Verb + Object
B.). Complex Sentence: ==> Complex Sentences - A complex sentence is an independent clause joined by one or more dependent clauses. A dependent clause either lacks a subject or a verb or has both a subject and a verb that does not express a complete thought. - A complex sentence always has a subordinator (as, because, since, after, although, when) or relative pronouns (who, that, which).
Dependent Clause + Subject + Verb + Object, Subject + Verb + object =====> Subject + Verb + Object + Dependent Clause + Subject + Verb + Object
Hope that helps!!!! : )