It's both! Scientists really can't agree on it.
Answer:
D
the skeletal system provides protection for the brain and spinal cord
They are called ENZYMES.
Enzymes speed up the rate at which the digestion process occur so that the nutrients in the food can be absorbed by the body and used for the development of the body.
<span>Model construction.....</span>
They grow slow, It helps break the object down precisely as it's needed to be<span />
