Which two animals are most closely related? explain.

snails and slugs

Slugs and snails belong to the Phylum Mollusca and are more closely related to octopi than insects. Slugs and snails are in a subgroup called the Gastropoda, the members of which have a head, a ventral muscular foot, and a shell (internal in slugs and external on snails).

this is my opinion of two close animals

answer; ///i believe the answer is (antioxidant);

answer; both surfaces of the membrane are nonpermeable