Albert is studying food web relationships in wetland ecosystems. He learned that hawks feed on shrews and shrews feed on cattails. What is the original source of energy for wetland ecosystems?

plants

insects

the Sun

predators

The Sun

Explanation:

All energy in any given ecosystem comes from the sun, the energy from sunlight in this case would then go to the cattails, the producers, and then to the shrews, the primary consumer, then the hawks, the secondary consumers, and so on and so forth.

The sun

Explanation:

It provides energy to the cattails, thus it is the original source.