Answer: cycling is important because it saves our ecosystem and without out it we don't have water bottles anything plastics,etc.
Explanation:
The answer is; atmospheric and oceanic circulations
The sun heats up the earth differentially. Therefore, local regions gain temperatures variably. In the local atmospheres, the less dense air rises and is replaced by cooler air masses creating winds and weather systems. In the oceans, the warm waters move towards the poles (on surface waters) as the cooler more dense water moves towards the equator deep along the ocean floor.