At one time large herds of bison roamed across the Great Plains. Brown-headed cowbirds often followed the bison, capturing and eating insects that scattered as the bison walked through the grasses. This relationship between the bison and the cowbird was ___.

I think it’s A girl i don’t know

Explanation:

bc one is benefiting:the bird

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!