The graph shows a population of green and brown beetles in a grassy area. Over time, more of the brown beetles avoided predators and lived to reproduce. What environmental factor most likely changed from 2015 to 2018?
A
A fire made the blades of grass short.

B
Less rainfall made the grass turn brown.

C
More nutrients made the grass grow quickly.

D
High temperatures made the grass turn green.

Which of the following best describes the expensive tissue hypothesis? brains require more energy, so the gut had to be reduced, and larger brains and tool use led to higher quality diets. increasing body size means that homo neanderthalensis had to include more fat in its diet. brains require more energy, so the gut had to be reduced as brains got bigger. brains require more fat, so the gastrointestinal viscera (gut) had to expand, and hands were needed to acquire more food.