<u>d) observing how the heart contracts to pump blood
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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
Answer:
the answers are the first one and the third one
Im sorry but its hard to read in all caps.. do you thin you could revise it so i can read it correctly?