So, the population went up with every spring season and fell slightly in the winter; it increased within the course of 10 years
West Nile lead to a decline in susceptible avian and human hosts, with a subsequent decline in the number of cases since 1997
Answer:
hope it helps
Explanation:
The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.
The answer to your question is B.
