Answer:
The muscular system is composed of specialized cells called muscle fibers. Their predominant function is contractibility. Muscles, attached to bones or internal organs and blood vessels, are responsible for movement. Nearly all movement in the body is the result of muscle contraction.
It’s option D cause we know that S orbital is spherical
It's b. calcium
because the outer electron structure in all of that element is similar, they have the same chemical and physical properties.<span />
There is no Bo element, however there is a B element which is Boron
