I believe it is B. Because during vigorous exercise, the heart rate and depth of breathing increases to supply muscles with more oxygen.
You can exercise, eat healthy, go on diet, ect.
A conflict arising between any two persons like in between siblings can be referred as relationship conflict, man versus man or external conflict.
Explanation:
The conflicts between siblings are usually due to
- Competence, achievements or over-performances of one over another
- Receiving unequal amount of attention from parents and others
- Personal, physical, or psychological issues
Conflicts arising due to achievement differences often lead to inferiority complex in the less achieved person and superiority complex in the high achieved person.
