Blood is a tissue because it is made up of different types of specialized cells. Aside from red and white cells, what else does blood contain?

Plasma is the liquid portion of the blood.  Blood cells like red blood cells float in the plasma. Also dissolved in the plasma are electrolytes, nutrients and vitamins (absorbed from the intestines or produced by the body), hormones, clotting factors, and proteins such as albumin and immunoglobulins (antibodies that fight infection).

Explanation:

i believe the correct answer from the choices listed above is the first option. the scientists need to look at the   validity of data, claims, hypotheses, and observations before  developing an argument. they base their arguments on facts that are present and they make sure they have proofs. 

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