Answer:
A. Obtaining nutrients and getting rid of waste
D is the answer, since Malthus<span> proposes the principle that human populations grow exponentially (i.e., doubling with each cycle) while food production grows at an arithmetic rate (i.e. by the repeated addition of a uniform increment in each uniform interval of time)</span>
Answer:
the molecules of liquid water change into water vapor and move into the air.
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Since it has 4 protons, it must have an atomic number of 4. (That makes it beryllium.)
Since it has a 4 protons and 5 neutrons, it has a mass number of 9.
