Tubes that lead from the heart to the rest bud
They drink water and then get rid of the waste
A salt is an ionic compound which needs a positive charge ion and a negative ion charge to form a salt.This means that the pair of element should be a metal and non-metal.This is simply because metal atoms tend to lose negative charge electrons and form positive ions while non-metals tend to receive the electrons from the metal atom to form negative charge ions.So answer is Cl and Li.
Any condition of unusual deposits of black pigment in different parts of the body is known as melanosis.
This condition is a form of hyperpigmentation that is associated with increased melanin. Hyperpigmentation, which is manifested as darkening on the skin, can be caused by sun damage, inflammation, or skin injuries. <span>There are different types of melanosis such as Melanism, ocular melanosis, smoker's melanosis, oral melanosis, Riehl melanosis.</span>
<span>the answer will have to be the second choice cause it seems more correct</span>
