Answer:
the answer is A
The bears fur is white to help it blend in and keep warm. suitable for the environment it lives in
 
        
                    
             
        
        
        
Antibiotics are ineffective in treating viral infections because Antibiotics kill only living cell. Antibiotics treat bacterial infections but not viral infections. Foe example, an antibiotic is an appropriate treatment for step throat, which is caused by the bacterium Streptococcus pyogenes. However, it is not the right treatment for most sore throats, which are caused by viruses. 
        
             
        
        
        
The difference in arrival time between the two types of seismic wave can<span> be </span>used to calculate<span> the distance of the </span>earthquake's epicenter<span> from the seismometer, as the further away an </span>earthquake<span> is, the greater the lag time between the detection of the S </span>waves<span> relative to the P </span>waves<span>.
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THEY ARE LIGHTER THAN WATER BY WEIGHT.
        
             
        
        
        
Answer:
Effects of greenhouse gases
Explanation:
They cause climate change by trapping heat, and they also contribute to respiratory disease from smog and air pollution. Extreme weather, food supply disruptions, and increased wildfires are other effects of climate change caused by greenhouse gases.