What is the most likely meaning of the root word "photo" in the word photoautotroph in
paragraph 7?

Light

Explanation:

Photoautotrophs are organisms that can make their own energy using light and carbon dioxide via the process of photosynthesis. Thus the root word photo most likely means light.

the correct answer is in fact b. spring tides are the highest, while neap tides are the lowest.

the correct answer is:

b. substitution property.

if the circle m is with inscribed ∠kjl and congruent radii jm and ml then m = ∠mjl = (kl) because of the substitution property.