Essayist: the argument says that Earth should be considered organism. As Earth doesn’t breath directly so as insects don’t literally breath using lungs
Insects are considered to be living organism so earth can also be considered as living organism.
(A) A reason for not rejecting Earth’s status as an organism on the basis of its not breathing.
Use insects as an example for not rejecting earth status as organism.
Hence A correct
(B) A reason for rejecting as false the belief that Earth is a living organism.
Essayists wants to consider Earth as living organism
(C) An illustration of the general claim that to be an organism, a creature must have a metabolism.
Insect example is respire without lings ; metabolism is not related with illustration in insects breathing
(D) An example of a type of organism whose status, like Earth’s is unclear.
Insect is considered to be organism
(E) An illustration of a type of organism out of which Earth is composed.
No, insect example is an exception to illustration of breathing without lungs