The answer to the biology question being presented above would be 'sexual reproduction'. Genetic variability is the most important result of sexual reproduction. In this variability, the genes are varied through sexual union and reproduction.
        
                    
             
        
        
        
The answer is oropharynx. The oropharynx is the center some portion of the pharynx (throat) behind the mouth. It incorporates the accompanying: Back 33% of the tongue. A delicate sense of taste. Side and back dividers of the throat.
        
             
        
        
        
Explanation:
Physical weathering is the disintegration of rocks into smaller chunks in nature. 
Water is one of the agents that causes physical weathering. 
- during periods of low temperature especially the summer, water usually collects within rock cavities. 
- When temperature drops, the water freezes and expands. 
- Periodic freezing and thawing of ice leads to physical weathering. 
- Also, in tropical regions, alternate wetting and drying of rocks occur. 
- When a rock is wet, it absorbs more water and it volume expands. 
- Drying occurs and it loses the water. 
- This continuous process leaves cracks in rock. 
learn more: 
Metamorphism brainly.com/question/1970623
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Carbon cycle : 
- CO2 is given out when organism breathe
- Plants gather this CO2 to produce oxygen
-  Oxygen that is produced by the plants is used for other organism's breathing which will given out another CO2 and repeat the cycle
Water Cycle :
- Water from the sea and lake is evaporated and Turned into Clouds
- When atmosphere cool it down, these clouds will condense and turn into rain
- Eventually this rain will flow back to the lake or sea and it will repeat the cycle
hope this helps
        
                    
             
        
        
        
Answer:
the right answer is A!.....