Answer:
The correct answer is - Increase in competition. destroy habitat, water and resources scarcity, and reduction in population.
Explanation:
Landslides are the movement of debris, rock, or land. It can be lethal and affects the ecosystem in various ways. The major effect on the ecosystem is destroying the resources and habitat of the organisms and even pollute water streams and water bodies with excess debris and sediment. It affects water quality and aquatic organism's habitat.
It destroys a large part of habitat such as forest, shelter and affects the life on the particular ecosystem. The reduction of the plants and vegetation leads to a reduction in food which increases the competition.
 
        
             
        
        
        
The rock will be 28 after two half lives
        
             
        
        
        
The answer is; Dead Zone
These areas have anoxic condition means they have very little to zero dissolved oxygen hence cannot support marine/aquatic life. This is as a result of eutrophication  caused by algae blooms. This phenomenon is brought about by pollution of these water reservoirs. These algae bloom take up all the oxygen in the water during their mass decomposgion hence leave no dissolved oxygen for the rest of the marine life. 
 
        
                    
             
        
        
        
Answer:
A mutation that cause changes to short stretches of nucleotides. These mutations affect the specific genes that provide instructions for various functional molecules, including protein . changes in these molecules can have impact on any number of an organism's physical characteristics