Friction is a force that works against motion. While walking, friction helps us maintain our stability and prevents us from slipping. Friction also works the same way with cars and vehicles in general, preventing them from skidding and helping them stop when the brakes are applied. We also need friction to make a fire.
B.4 When the diameter doubles the volume eight times and the surface four times would be increased so that's why the answer is 4
Answer: The answer is A. Comparative
Explanation: The photo shows two different types of soil with the same type of worm. Therefore this it a comparative experiment. Trust me I got this question correct.
Pollution is always a good way to go but you don't have to do air pollution you can do water pollution or both air and water pollution.
Bc you should know i guess
