Hello,
Your answer would be:
B. increasing salinity as some water freezes
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Answer:
Small Pox
Medical Condition
A deadly viral disease that has been completely eradicated.
How common is condition?
Extremely rare (Zero cases in US in 2015)
How is condition transmitted?
Transmitted through direct contact
Is condition preventable by vaccine?
Usually preventable by vaccine
Does diagnosis require lab test or imaging?
Requires lab test or imaging
Is condition treatable?
Treatments can help manage condition, no known cure
Time taken for recovery
Can last several days or weeks
Caused by infection with variola virus. Rashes on the face, hands and torso which form blisters and scabs which lead to formation of deep pitted scars. Smallpox has no cure; treatment involves managing symptoms.
Explanation:
Coral reefs provide an important ecosystem for life underwater, protect coastal areas by reducing the power of waves hitting the coast.
