The correct answer is "object complement", because it follows a direct object (in this case "the normally flat land") and renames it or states what it has become. It cannot be "predicative nominative" because "hilly" is not a noun, "direct object" here is "the normally flat land", and a predicate adjective follows a linking verb (for example, She is PRETTY.) So the only option left is "object complement".
Answer:
to show how gases move under the force of a black hole
I think when it says you deserve the best because that evokes emotion
The correct answer is A ephemeral--evanescent
Both words refer to concepts that are quickly fading, last for a short time, disappear, or similar.