Some examples would be the Silk trade or even their Food.
Around 400 million years old
I'm pretty sure they are talking about the revolution of the moon orbiting the Earth. (Which is going counterclockwise) I'm not 100% sure though.
The sea erodes rocks with hydraulic action and abrasion. More and more erosion occurs making the rock more steeper until it forms a cliff.
<span>Confidence votes 3.1K. Sustainable logging means logging an area in such a way as there is always trees to be cut. In other words, logging in a way that leaves young trees, medium age trees and mature trees behind each time you log, so that you can always log that area in the future.</span>
