Which of the following is an example of a biotic factor? (2 points)
Group of answer choices
The salinity level in a salt marsh
The temperature of water at the seafloor
The shrimp population in a bay
The amount of sunlight reaching a seagrass bed

This is a biological reaction due to a stimulus. i need this quickly !

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred

Plants transfer carbon in the carbon cycle a. through assimilation of carbon from the soil. b. when carbon transpires from their stomatae. c. when they are eaten by animals. d. through fixation of carbon in the soil.plants transfer carbon in the carbon cycle a. through assimilation of carbon from the soil. b. when carbon transpires from their stomatae. c. when they are eaten by animals. d. through fixation of carbon in the soil.