After having one concussion you are more likely to have another — some doctorsestimate you increase your risk up to three times. There are two reasons why your risk increases: carelessness and brain chemistry.
Answer:
All natural soils are heterogeneous mixtures because no two nature soil samples will have the precise proportions of its inherent components.
Explanation:
Answer: Fitness or camouflage
Explanation: C and D don’t make any sense
