Imagine a different system in which toads had a wide range of variation in color. In some ponds, most of the toads are light in color. In other ponds, the average color is fairly dark. From the options below, select which represent TESTABLE hypotheses that could explain this difference in coloration. Check all that apply: A predator that is present in some ponds prefers one color to the other. Female toads in some ponds prefer darker toads, while females in another pond prefer lighter toads. Toad color is determined by food quality, which varies pond to pond. Toads can change their color, based on their stress level.

There answer is options 1 and 2.

Explanation:

To test the example given in the question where some ponds have toads with darker colors and some with lighter colors, we can select;

1 - Ponds can be observed for the feeding habits of the predators and this can explain why toads with lighter or darker colors are the majority of the population in some ponds.

2 - The mating preferences of the female toads can be observed and examined statistically which can give us a pattern of preference.

The other options can not be selected as testable hypotheses because of the uncontrollable and subjective variables such as the quality of the food or the toad's genes and the stress of the environment of the pond.

I hope this answer helps.