Reaction rate is calculated using the formula rate = Δ[C]/Δt, where Δ[C] is the change in product concentration during time period Δt. The rate of reaction can be observed by watching the disappearance of a reactant or the appearance of a product over time.
Answer:
air resistance or drag, (Option B)
Explanation:
C...the key is that they are photosynthetic...so they produce oxygen (like plants)!
