Aristotle
According to Aristotle "Happiness is the meaning and purpose of life, the whole aim and end of human existence"
<h3>What is Happiness ?</h3>
Happiness is a life that is being well led through virtue, living well and acting well.
- Happiness depends on ourselves.” More than anybody else, Aristotle enshrines happiness as a central purpose of human life and a goal in itself. 
- Aristotle tells us that the most important factor in the effort to achieve happiness is to have a good moral character — what he calls “complete virtue.”
- But being virtuous is not a passive state: one must act in accordance with virtue.
Learn more about Happiness here:
brainly.com/question/7292814
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Explanation:
1st question is humans eat other organisms to get nutrients they need to survive.
2nd one is Eukaryota domain
 
        
             
        
        
        
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D. Spindle Fibers
Explanation:
During anaphase, the centromeres of each chromosome split and the mitotic spindle pulls the sister chromatids apart.