Involves leaving trees of different sizes and types to create an ecosystem; more expensive type of foresting

I think the appropriate response is Forest ecosystems. It is a characteristic forest unit comprising of all plants, creatures, and small-scale living beings here working together with the greater part of the non-living physical components of nature. The woodland biological system is vital.

Yeah the blue whale
It's the largest animal on earth!
I hope that's what you mean, I'm kinda not sure :(