Dr. Simeon and her team are studying global climate change. They develop a set of mathematical equations that relate climate data gathered over the past 100 years. Then, with the aid of a computer, they use the equations to predict climate change in the future. The team's use of
mathematical equations and computers is an example of which science process?
A. Observation
B. Gathering evidence
C. Experimentation
D. Modeling

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.

d. planting trees

the trees take in carbon to make oxygen.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.