The correct answer is Carol has a cottage near the shore.
This supporting detail has nothing to do with her study of marine life. She could have this cottage because she inherited it, or she just likes the place - it doesn't really contribute to her love or study of marine life. The other options clearly support why she is studying marine life, whereas the one with the cottage does not.
Absence- the state of being away from a place or person.
Amendment - a minor change or addition designed to improve a text, piece of legislation, etc.
Annex- append or add as an extra or subordinate part, especially to a document.
Believable - of an account or the person relating it) able to be believed; credible
Characteristic- typical of a particular person, place, or thing
congratulations -words expressing praise for an achievement or good wishes on a special occasion.
consumer - a person who purchases goods and services for personal use.
convict - declare (someone) to be guilty of a criminal offense by the verdict of a jury or the decision of a judge in a court of law.
culprit - a person who is responsible for a crime or other misdeed.
Delicious - highly pleasant to the taste.
Especially - used to single out one person, thing, or situation over all others.
frightful
Ghostly- of or like a ghost in appearance or sound; eerie and unnatural.
Inanimate -not alive, especially not in the manner of animals and humans.
Landmark - an object or feature of a landscape or town that is easily seen and recognized from a distance, especially one that enables someone to establish their location.
Percent - by a specified amount in or for every hundred.
Pertinent - relevant or applicable to a particular matter; apposite.
Pressure - continuous physical force exerted on or against an object by something in contact with it.
Susceptible - likely or liable to be influenced or harmed by a particular thing.
Therapy - treatment intended to relieve or heal a disorder.