Question

37.

Which substrate would you more likely find on the bottom of a river pool?
A. silt
B. gravel
C. cobbles
D. rocks

Answer 1

cobbles

Step-by-step explanation:

bc i have a river in the back of my yard

Answer 2

Substrate. The substrate is the surface on which the river organisms live. It may be inorganic, consisting of geological material from the catchment area such as boulders, pebbles, gravel, sand or silt, or it may be organic, including fine particles, leaves, wood, moss and plants.