Answer:
A
Explanation:
Laws. The system of rules, or statutes made by the government of a country, state, city. Statutes are enacted by legislative body, then signed by the ranking official (President/Governor). Everyone must follow them to be legal. Regulation is an abstract concept of management of complex systems according to a set of rules and trends. In systems theory, these types of rules exist in various fields of biology and society
Epithelial tissue covers the body surface and forms the lining for most internal cavities. The major function of epithelial tissue includes protection, secretion, absorption, and filtration. The skin is an organ made up of epithelial tissue which protects the body from dirt, dust, bacteria and other microbes that may be harmful. Cells of the epithelial tissue have different shapes as shown on the student's worksheet. Cells can be thin, flat to cubic to elongated. Cited from: https://www.msnucleus.org/membership/html/k-6/lc/humanbio/4/lchb4_3a.html
C) Red Blood Cells
Red blood cells contains hemoglobin, which provide oxygen