How do scientists use the evidence they gather? O A. The evidence supports scientists' personal opinions about
politics.
B. The evidence helps scientists come up with explanations about
the natural world.
C. The evidence proves that scientists are always right.
D. The evidence helps scientists write new laws for people to follow.

answer: populations of walruses and polar bears will decline

explanation:

you put it

b is the best answer for this question.

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.