The correct answer is <span>(a) biomass
Biomass is carbon based just like coal and oil which are bad because they're fossil fuels. However, unlike them, biomass is renewable, which is good, but is also bad for the environment.</span>
Friction is what's letting gymnast control his weight by having a tight grip on the bar. Without friction it would be like them trying hold on to ice.
Answer:
The average speed is 5.8 m/s
Explanation:
I just did it