Rearrange the parts of the sentence in correct order.

American alligators were

P. now this species is classified as least concern

Q. list in 1967, their population increased and

R. once threatened by extinction but

S. after being placed on the endangered species

RSQP

The correct answer is Option (3) - RSQP

The correct order of the jumbled sentences is RSQP.

The sentence is about how American alligators were once threatened by extinction but after being placed on the endangered species list in 1967, their population increased and now this species is classified as least concern.

Here is the explanation:

• R is the verb, which means to be.
• S is the object of the verb, which is the endangered species list.
• Q is the modifier of the object, which describes the list as being in 1967.
• P is the modifier of the subject, which describes the alligators as being once threatened by extinction.