I think it’s b or c, sorry I’m not sure which one! Hope this is helpful
Cellulose. Our bodies as humans lack enzymes to break the cellulose down.
Loss of habitat for the surrounding wildlife. therefore a long term affect of the wildlife that lived there. If deforestation continues the forest and its inhabitants with either have to relocate or die trying to find a new place to live.
It would be .5. If there is a probability that two thing could happen it would be 50 50 shot.