Answer:
adding chlorine, checking the water.
Explanation:
Because this increases the quality of the water while the rest improve either quantity, or ease of access.
Answer:the color explanes it's self old and young
Explanation:
Answer:
In order to establish and maintain their complex organization and structure, organisms must obtain, transform, and transport matter and energy, eliminate waste products, and coordinate their internal activities. Cells take highly varied forms in different plants, animals, and microorganisms.
Explanation:
Id hav to go with A,reason i say that is, synthetic is man made..so it could b altered at anytime