Direct object.
The direct object receives the action of a verb in a sentence.
The indirect object represents to whom or for whom something is said.
Ex: Sandra gave the book to Tom.
Sandra is receiving the action: she gives the book
Tom is the one getting the object
Answer:The sentence above is a simple sentence.
Explanation
The sentence above is a simple sentence because it contains only one independent clause. Simple sentences have no dependent clauses. Moreover, they are also called clausal sentences and they may have modifiers besides a subject, a verb, and an object. On the contrary, compound sentences join two or more independent clauses with a coordinator such as for, and, but, or a semi-colon.
Answer:
When two words are formed together to make a new meaning, a compound is formed.
The airplane had flown over the country.
Hope this helps!