How do the animals in an ecosystem mainly acquire the sun’s energy?

a)they absorb energy through their skins.
b)they obtain energy when they drink water.
c)they obtain energy trapped and stored by plants.
d)they can convert the sun’s energy into chemical energy

Aresearcher created three groups based on participants bmi: normal weight, overweight and obese. the hypothesis being tested is that the three groups differ in the mean number of artificially sweetened drinks consumed weekly. which statistical test might the researcher use, assuming a reasonably normal distribution of values.