Question

for the past few years, more northern states have seen deaths caused by infections of n. fowleri. which of the following describes a change in the ecosystems that explains this trend?
climate change has increased global temperatures.
changes in precipitation have decreased the amount of surface runoff.
competition from invasive species has decreased decaying vegetation.
a longer winter season has increased the amount of ice sheets in the lake.

Explanation:

Naegleria fowleri is an amoeba that thrives in warm - water environments. Climate change increasing global temperatures can create more favorable warm - water habitats for N. fowleri in northern states, leading to more infections and deaths. Decreased surface runoff would reduce the water bodies where it can live, decreased decaying vegetation would reduce its food source, and more ice sheets mean colder water which is not favorable for it.

Answer:

Climate change has increased global temperatures.