Part A: Forming a Thesis A thesis statement is the central idea of your argument. It should be focused and provide answers to the question, What am I trying to claim? It should tell listeners how you think Earth’s climate zones will change over the next century. Write your thesis statement in the answer space.

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.