Fact 1: Sponges are a source of food for many species of fish.

Fact 2: Fish and other marine animals abound here.

Given the two facts above, answer the question "Marine animals find these to be a great source of food:" with the following options: 
- grain
 - nutrient
 - sponges
 - Energy.
 - sea vents
 - sodium
 - Energy
 - fungi


 

   sponges      