The mitochondria is in the brain used as a powerhouse. Basically without it our brain would not be able to function
Science include hypothesis
The relative balance within an optimal range also known as homeostasis
Producers make up the basis of energy in an ecosystem
Answer - The polarity of the water molecule helps it to cohere to nearby water molecule. Forming a skin over.
Reasoning - Since the polarity is all close and wanting to bond they have a surface tension which come together to making a skin like over.