Question

The most important factor controlling the types of biome found on land is the …….

Answer 1

Plants are the major producers in terrestrial biomes. Almost every terrestrial organism relies on them either directly or indirectly for food. Plants require air, warmth, sunlight, water, and nutrients to develop or grow.

Complete answer:
A biome is a group of comparable ecosystems that cover a broad area. Biomes are major subdivisions of the biosphere. Climate is the most vital abiotic (non-living) factor affecting the distribution of terrestrial biomes of various types. Climate determines the growing conditions in a region, so it also determines what plants can grow there. Animals depend directly or indirectly on plants, so the sort of animals that live in a region also depends on climate.

Additional Information:
Biomes are characterized by the life sorts of their dominant organisms, but not necessarily by their particular species. On land, biomes are basically known through their mature or older-growth vegetation. In contrast, aquatic biomes are basically differentiated by their dominant animals. Biomes are classified employing a system that's used at a world level—that is, by ecologists working in many countries. By influencing plants, which are the most producers, climate influences the biodiversity of terrestrial biomes. Plants and other organisms also develop adaptations to climatic factors in their biomes, developing adaptations to ultimate cold and dryness.
So the correct answer is 'climate'.

Note: Marine biomes are most strongly influenced by water depth and upwellings, which affect the amounts of light and nutrients that are available to support primary productivity. Temperature and precipitation importantly determines what quiet season or soil quality the terrain may have, which therefore influence the expansion of plants living there.