The section with the subheading "Two Answers" likely pertains to:
A. answers scientists have come up with about why some species of cave fishes are blind.
This section probably delves into the explanations or hypotheses proposed by scientists regarding the loss of vision in certain species of cave-dwelling fishes.
It might cover factors such as the absence of light in caves, evolutionary adaptations, genetic changes, or environmental pressures leading to the regression or loss of eyesight in these specific organisms.