Answer: Mosses retain soil humidity and prevents its degradation, besides are habitat for little invertebrates.
Explanation: Mosses are non-vascular plants (they don't have conductive vessels as xylem and phloem) that live places as tree trunks, rocks, walls and soils. This habitats must be humids because mosses need water for nutrient transport,  because they don't have cuticle (prevents water lost) and for fertilization. Mosses are important for the ecosistems where they live because retain water in the soils thus prevent erosion and  harbor invertebrates as Tardigrades (water bears).
 
        
             
        
        
        
Phloem Surface Cells transport food/nutrients from the leaves to the roots.
        
             
        
        
        
Sea levels rise, loss of habitats, extreme weather events, loss of ecosystems (not enough time for them to adapt to increase in heat) hope that helps
        
                    
             
        
        
        
D. The data for the average heights of the plants in trials 1 and 3 contains errors 
Explanation: Please double check my answer.