Explanation:only non-metal kinds of element can perform covalent bond which is the sharing of electrons. I.e hydrogen gas, h2 where they share 1 electron to be stable
Blood is considered a suspension because it is a heterogeneous mixture of solid particles, non dissolved red and white blood cells, platelets, and proteins of various sizes and shapes, suspended in a solution. It contains a solution, but is not a solution where everything would be dissolved, i.e. homogeneous.