Final answer:
Charged metal ions (salts) are important for various biological processes, and water serves as a universal solvent and participates in important biological reactions.
Step-by-step explanation:
Charged metal ions, also known as salts, are important to life on Earth because they play crucial roles in various biological processes. For example, they are involved in nerve impulse transmission, muscle contractions, enzyme activity, and maintaining the balance of fluids and electrolytes in the body. Some essential minerals like sodium, potassium, and calcium exist as charged metal ions in the body.
Water is also vital for life on Earth. It serves as a universal solvent, allowing many important biological reactions to occur. Water acts as a medium for transporting nutrients and waste, regulating body temperature, lubricating joints, and participating in chemical reactions, such as hydrolysis and dehydration synthesis.
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