The most obvious way we can establish and maintain a healthy coastal ecosystem is by recycling all recyclable materials and trying to live with as little waste as possible. Also, using clean transportation, such as biking and such, would help slow down air pollution; giving sealife clean air to breathe.
 
        
             
        
        
        
Answer:
response to stimuli / tropism
Explanation:
The plants and animals always respond to stimuli. It is an innate character of all living things. When a bright light falls on the eye, it closes immediately. This is responding to the stimuli. When someone touches the leaves of touch-me-not plants it closes its leaves due to the external stimuli. 
The plants respond to the light. Because it does photosynthesis in the presence of light. Therefore, the leaves and branches of the plants always bend towards the light. This process is called phototropism. 
Similarly, the roots of the plants move towards gravity under the ground. This is called geotropism. 
Besides phototropism and geotropism, other types of stimuli are there - hydrotropism(response to the water), chemotropism(response to certain chemicals).
That's why the plants growing on the windowsill move towards outside where light comes.
 
 
        
             
        
        
        
The answer is B)Atmosphere
        
                    
             
        
        
        
<span>The group of snails would represent the "population" level of ecological organization. A single snail would represent and Individual. The snails and beetles would represent a community, and the garden itself with the various creatures would represent and ecosystem.</span>