i want to say global warming but  that also affets the atmosphere
 
        
             
        
        
        
the part of the heart takes blood from the veins and pumps it into ventricle is called atria
        
             
        
        
        
The zygote must contain genetic information from the mother and from the father, so the gametes must contain half of the chromosomes found in normal body cells.
Hope this helps:)
        
                    
             
        
        
        
Answer:
b. heat energy
Explanation:
Water, which is able to exist in three different states moves from one form to another. Water can move from the ocean to the atmosphere via a process called EVAPORATION. During the process of evaporation, the sun plays a major role by supplying the HEAT ENERGY required to change water from its liquid form in the ocean to its gaseous form in the atmosphere.
Water cycle of the earth helps ensure that water is not lost in any of its forms. Liquid water stored in the ocean gets evaporated as a result of heat energy into the atmosphere as water vapour. 
 
        
             
        
        
        
The correct use of hand hygiene using an alcohol-based hand-rub are for these situations:
- After removing gloves,
- Before entering a client's room,
- After applying a clean, dry dressing
<h3>What ae the steps required to maintain hygiene in a hospital environment?</h3>
Hygiene is the process by which an clean environment free of germs is kept in place.
A  hospital environment requires that proper hygiene is maintained in order to prevent the outbreak of diseases.
Some steps in maintaining hygiene in the environment include:
- Mopping the floors with disinfectants liquids
- Cleaning of surfaces with alcohol-based sanitizers
- Using an alcohol-based hand-rub 
The nurse will demonstrate the correct use of hand hygiene using an alcohol-based hand-rub as follows:
- After removing gloves,
- Before entering a client's room,
- After applying a clean, dry dressing
In conclusion, alcohol-based hand-rubs are important to maintain hygiene.
Learn more about alcohol-based hand-rubs at: brainly.com/question/25051422
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