“Interim” means in or for the intervening period; provisional. Options B and C are synonyms of the word and A and E are irrelevant. “Permanent” is the word which best explains the opposite meaning of “interim”. Thus, option D is the correct answer4
Here from the above options, Algae is an Autotroph.
Autotrophs :
An Autotroph is also called as Producer, is an organism that produces complex organic compounds from simple substances present in its surroundings, generally using energy from light or inorganic chemical reactions.