Answer:
A. coniferous and deciduous
Explanation:
From the list provided about the major biomes on Earth, there are two that are lacking, both being forest biomes. One of them is the deciduous forest biome, and the other one is the coniferous forest biome.
The deciduous forests are located in the mid-latitudes. They are characterized by forests that are shedding their leaves and then growing them again. These forests have plants that are capable of sustaining both high and low temperatures. This biome can be found in most of Europe, the Eastern part of North America, highlands in the Middle East, Eastern east Asia, southern South America, southeastern Australia and other smaller areas.
The coniferous forests are located exclusively on the Northern Hemisphere. They are characterized by conifers, which are ever green, and very well adapted to extremely low temperatures. This biome is found in the higher latitudes, between the temperate and polar areas, as well as in the higher mountains in the mid-latitudes.
