All of the following are signs or symptoms of a concussion, except: Double or blurry vision
Feeling sluggish, hazy or groggy
Headache
Difficulty sleeping
Dizziness
Bothered by noise
Memory issues
Difficulty paying attention
Difficulty breathing
Confusion

so we know the answer cannot be c because no insect or animal starts as an adult

the answer is a. a swimming larvae

because since they are sea animals they automatticaly have to know how to swim they cannot just sink to the bottom

sorry if this is the incorrect answer.

answer; (b) i believe its metabolic rate of the patient; plz check first