True, because of the hot and dry summers, periodic fires are an important abiotic.
The specific adaptation of the sloths to their niche is energy conservation: they survive by trying not to loose any energy and trying not to move too much. They have less muscle because they don't need it: their adaptation is to move less. So the correct answer is to a) conserve energy.
Sweet potatoes, broccoli
a few more for you- kale, celery, chilli pepper, pea, grapefruit, apricot