I believe it is the first option
For which virus is the mosquito not known as a possible vector?
Smallpox is the virus that mosquitos are not known as a possible vector.
The answer would be the last option which is:
protecting the body
excreting wastes
regulating temperatures
generating vitamins
This includes the skin and its extremities acting to shield the body from different sorts of harm, for example, loss of water or scraped area from outside. The framework has numerous parts in homeostasis. All body frameworks work in an interconnected way to keep up the inside conditions fundamental to the capacity of the body, the skin has a vital activity of securing the body and goes about as the body's first line of protection against contamination, temperature change, and different difficulties to homeostasis.
There are many benefits for eating fish and shellfish but there are risks as well. one of those risks include mercury poisoning from eating to much fish. the good thing about eating fish is that you get omega 3 which is good for you hair, skin, and nails. it makes all three of them shine and have a natural glossy look.