The comma attempts to join 2 independent clauses. B
Physical activity is helpful for your heart muscle and also strengthens your immune system also good for your lungs and helps maintain your weight <span />
The rhythmic sequence at which your heart beats is called a sinus rhythm, it is when the atria and ventricles of the heart contract.
Answer:
to treat any possible bacterial infection
Explanation:
the main cause of most illnesses could be a bacterial infection
