Answer: A.) The nitrogen cycle recycles nitrogen through an ecosystem, making it available to all organisms.
Explanation: Nitrogen is an essential nutrient for plants and a significant component of proteins, which all animals need to grow, reproduce and survive. The nitrogen cycle converts nitrogen into compounds that plants and animals can use.
 
        
             
        
        
        
D. Chromosomes
DNA in the nucleus is found in structures called chromosomes.
        
             
        
        
        
Answer:
An involution would be a good example of an inadequate adapting process
 
        
             
        
        
        
Answer:
renewable resources. some examples are solar energy,trees, and fruits............................. love yall hope i helped pls give brainliest