Answer:
A. weak : frail
Explanation:
"weak" and "frail" are the best option among the words listed in the question.
"Thin" and "gaunt" refer to they physical appearance of a person, who looks "frail" or "weak". The words "weak" or "frail" having more of a figurative meaning, that is still similar to "thin" or "gaunt".
Pets are reliable friends to owners needing companionship. Doctors need to consider that a pet is most likely to lower blood pressure and stress in a patient. Pets need to suffer from lack of attention and shelters can provide homes by partnering with those that use a pet.
Ehat?? Tjid id à way to get Free points