Which of the following can upset the balance of an ecosystem? too much water
not enough water
too much light
not enough light
all of the above
none of the above

All of the above.

Explanation:

all four of those situations can cause plants to die and animals with it. Without plants, herbivores will not have food and either die or leave, and without herbivores, carnivores will face the same situation.

apes

explanation:

evolution theory

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.