Final answer:
The coniferous tree most likely to be found in a cool, alpine mountain area is a Pine tree. Conifers are evergreen trees that dominate cold or arid environments and high altitudes.
Step-by-step explanation:
The coniferous tree most likely to be found in a cool, alpine mountain area is b) Pine tree. Conifers are the dominant form of vegetation in cold or arid environments and at high altitudes. They are evergreen trees like pines, spruce, and fir, which retain their needle-shaped leaves year-round and have adapted to the harsh conditions.