Please post the questions
        
             
        
        
        
Explanation:
The chemicals are contaminant in the ground water system and they can inflict serious health hazards on humans when water is sourced from such polluted ground water system. 
- Consuming contaminated water can lead to cholera and diarrhea. 
- It makes ground water toxic and poisonous. 
- Drinking contaminated ground water can lead to the introduction of heavy metals in the body. 
- Chemical wastes containing radioactive materials can damage body tissues. 
- They render ground water unsafe for drinking ans usage. 
Learn more: 
Air pollution brainly.com/question/10743354
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Simple....
as you've learned... cells create tissue..tissue creates organs...organs create organ systems..and organ systems create organisms. They all work together to create something...
An example:
muscle cell-->>muscle tissue-->>heart-->>circulatory system-->>the circulatory system makes up a part of the body.
Thus, your answer.
        
             
        
        
        
The energy pyramid describes decomposers compared to energy lost as heat. Primary producers start at 100% and it decreases to 10% at primary consumers, 1% at secondary, .1% at third level, and .01% at apex.
The biomass pyramid describes the total mass of an organism and as a biomass moves up, the overall mass is losing volume. This means it decreases as it moves from the bottom to the top.