Answer :

as humans we can do whatever to gentically modify trees, but trees take over 100 years to grow back, to fix this, we could prevent unessecary tree cutting and plant new trees for the next generations , they're renewable because  they can be replenished over a course of time
Trees are a renewable resource because they grow back. Trees are used for all types of things such as ecosystems or food (berries etc.). It is important for us to keep replanting trees so that the generations beyond have the same advantages as us. It is not renewable however, when they are cut down. This can make some speices become extinct. Even though we need to cut down some trees it is important that  at least 1 tree is planted for every 1 cut down. Otherwise, there won't be any trees left... or animals... hopefully this is something like wat u were looking 4... :P