Catalyst maybe ( lower activation energy).
<span>C. Frogs will have brain damage if exposed to both brown sugar and regular sugar.</span>
Your circulatory system consists of your heart, blood vessels and blood, and is responsible for transporting life-giving oxygen throughout your body. When you exercise, your body's need for oxygen increases; the harder you work out, the more oxygen your body demands.
I could help if I knew what you needed help with
