D prevents repeating. experiments have to be repeated to be reliable.
Human activities in the united states such as burning fossil fuels for electricity, heat, and certain transportation.
hope this helps :)
Answer:
The correct option is d (photosynthesis)
Reason:
Photosynthesis and respiration falls in the category of bioenergetics and metabolism, because photosynthesis end product is glucose which is utilized in respiration to produce ATP.
Answer:
a
Explanation:
the core comes first, then crust, then mantel, then landform, then water
