There is nothing but
The little boy jumped up and down.
There's no prepositional phrase in that.
If you have more sentences and I will put answers in Ask for details.
You didn't italize or mark the phrase, but I see one good candidate:
"The circus animal trainer" is in a way another name given to Mervin, a kind of "renaming" him: this is called an appositive phrase, so if this was the phrase appositive phrase is the answer! (also, I don't see the other phrases here).
Answer:
Sentence #1
Explanation:
Why things wouldn't be capitalized correctly:
-seasons aren't capitalized (eliminates sentence 2)
-months are capitalized (eliminates sentence 3)
-unimportant objects are not capitalized (eliminates sentence 4)
Answer: Martin Luther King Jr. was an American minister and activist for civil rights in the 1950s and 1960s.
Explanation:
A simple sentence is made up of an independent clause along with one single subject and a verb with a compliment.
In the first option, there is a single independent clause which is that MLK was an American ministers and activist. The subject is MLK and the verb and compliment are the years he was active.
The other options have multiple clauses.