Direct object is D. A NOUN, PRONOUN, OR WORD GROUP THAT RECEIVES THE ACTION OF THE VERB.
Direct object follows a transitive verb (action verb) not a linking verb. It is always placed after the verb not before it. It receives the action not modifies the action verb.
Answer:
1: Living things in an ecosystem
2: The organism that feeds is called the predator and the organism that is fed upon is the prey
3: producer
4: Energy flows through an ecosystem in only one direction. Energy is passed from organisms at one trophic level or energy level to organisms in the next trophic level. ... Organisms need it for growth, locomotion, heating themselves, and reproduction.
6: population
Explanation:
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).
