The correct option is
A AdamsiaHermit crab develops a beneficial
association with Adamsia.
Adamsia is a genes of sea anemones
in the family Hormathiidas. Species
in this genes are mutually symbiotic
with hermit crabs. The anemone
get a place to live of declared scarps
of the crab's fact in exchange for its
helps in the crab's defense. As these
anemones grow, they secrets a horny
membrane, known as carcinoma,
which overlies the crab's original
snail shell & expands the living
space of crab. This means anemone
does not have to change substance
& the crab does not have to
seek a large shall as they both
grow.