Answer:
B. Populations of amphibians in a few local areas have declined dramatically in the last few decades
Explanation:
The continuous, low-level extinction of species that has occurred throughout  the World and at least six species of frogs have not been seen for one to three decades and also it has recently been discovered that some species of salamander-specific chytrid has gone into extinction
 
        
             
        
        
        
Answer:
scientific conclusions are reliable as they are helpful for many things however it is true that after the evolution of new ideas the old theory have some changes or may change fully or may be proved wrong but yeah the old theories are still helpful for many reasons and things.
so I think scientific conclusions are reliable 
 
        
             
        
        
        
Answer: Fossil fuels are made up of dead plant life example trees, bushes, etc., and when burned they release carbon in the air 
  
        
             
        
        
        
The brain which, along with the spinal cord gathers informationand responds to changes in the environment.