Which of these is a thesis statement?
Group of answer choices

Even though you can complete balance activities with no equipment, a Bosu ball is a must-have piece of equipment for people who want to improve their balance and core stability.

Exercise increases the blood flow and raises oxygen levels in the body, lowering the risk of heart disease.

The structure and function of the brain is improved by the proteins and chemicals released by the body during exercise.

Endurance, strength, balance, and flexibility are four types of exercise that can improve your health.