The true statement for the energy in ecosystems is "Producers only absorb 40% of the sun’s energy, most of which is lost during photosynthesis". The correct option is A.
<h3>What is ecosystem?</h3>
An ecosystem is a geographical area in which plants, animals, and other organisms, as well as weather and landscape, coexist to form a life bubble. 
Ecosystems contain both biotic and abiotic components. Plants, animals, and other organisms are examples of biotic factors.
Energy must be transmitted throughout an ecosystem. The sun is the ultimate source of energy in an ecosystem. 
Plants and marine ecosystems make up the majority of the terrestrial ecosystem.
Thus, the correct option is A.
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Answer:
Conduct an experiment. 
Explanation:
Any scientific hypothesis or theory requires the proper step and the procedure to explain the particular points about the theory. Any statement made in the science needs the experimental proof.
The scientific experiments includes the different steps used for the validation of any hypothesis. The experiments can explain the main cause of any phenomena and the factors that might affect the experiments. The experimental studies are performed by the scientists.
Thus, the correct answer is option (e).
 
        
             
        
        
        
Answer:
Harmful
Explanation:
When you have an autoimmune disorder, your immune system does not distinguish between healthy tissue and potentially harmful antigens.
 
        
             
        
        
        
Answer:
Increase
Explanation:
The predator is a type of animal or bird species which kill other animals to obtain its food. The prey is the animal which is killed by the predator. According to the given situation, if the predator species A is eliminated, the population of the predator B will likely increase because there will be no competition between the two species for the same prey. And the chances of predator B obtaining the prey will increase. Hence, the population will increase.