predators herbivores scavengers decomposers
I gave my students this multiple choice question: When a prairie ecosystem was disturbed, an invasive grass species outcompeted the native grass. The new grass had less nutritional value for the organisms living in the area. Which category of organism will be affected by this change first?

Only one answer is correct among these 4 choices:
- predators
- herbivores
- scavengers
- decomposers

Could you tell me which one is correct?

herbivores