A. Syphilis is a communicable disease. The others are diseases originating from within the body.
The answer is B explaination is because bears that hibernate is an example of structural adaptations because they have to adapt to the new structures for their new habitat in order to hibernate
It is important to laugh because of these reasons.
Laughing<span> lowers blood pressure
Reduces stress hormones
Increases muscle flexion
Increases the circulation of antibodies in the blood stream
Makes us more resistant to infection.</span>
stop cheating do it yourself.
Explanation:
