Answer:
Mt St Helen’s Lake is an example of Temperate Coniferous Forest.
So correct answer is option A.
Step-by-step explanation:
It is located in Washington DC in USA. The Mt St Helen’s Lake is also called Spirit lake. It is actually a volcanic lake, formed on the crater of Mt St Helen. It is situated in the temperate region. So the vegetation is of temperate region.
Being a mountainous region, there’s no deciduous trees. Whereas, conifers occupy the region, leading to a temperate coniferous vegetation.