Hi there! I believe the answer is:
D. An explanation of natural events that is well supported by scientific evidence
I hope this helps :)
Neutron stars are created when
giant stars die in supernovas and
their cores collapse, with the
protons and electrons essentially
melting into each other to form
neutrons. Credit: NASA/Dana
Berry
The energy from cellular respiration comes from food and air. The reactants first cellular respiration are oxygen and glucose. Glucose is a form of sugar and comes from food, and oxygen is found in air.
The main reactants or cellular respiration, as stated above, are oxygen and glucose.
During the first stage of cellular respiration, which takes place in the cytoplasm, a small amount of energy is produced when glucose is broken down into smaller particles.
Only about 3 percent of the worlds water is fresh, and even less than that is usable, because most of it is locked up in glaciers or in permanent snow fields.
The correct answer is D.
7: symbiotic relationship
8: mutualism
9: commensalism