1. this cold, dry biome is populated by lichens and shrubs that can survive great seasonal variations in sunlight and temperature.
2. in this hot, dry biome, populations of zebras, gazelles, and giraffes are concentrated around widely spaced watering holes.
3. also called steppe or prairie, this biome has been extensively developed for agricultural use due to its nutrient-rich soils.
4. despite having lush vegetation and diverse biological communities, the soil in this biome has low nutrient content and cannot support long-term agriculture.
5. this is the driest biome, where many plants have water-conserving features such as thick leaves and needles.
6. this biome is characterized by broad-leaved trees that lose their leaves each fall and remain dormant during winter.

1. Tundra

2. Savanna

3. Temperate grassland

4. Tropical rainforest

5. Desert

6. Temperate deciduous forest

Explanation:

1. Tundra: This is a biome where there are no trees due to the frozen components of the soil. They are located near the North Pole. Lichens and shrubs grow and survive in this biome.

2. Savanna: This is a biome that experience two weather seasons which are the Dry season and Wet season. The trees in a savanna are scattered and well spaced.

3. Temperate grassland: This is a biome that it's major vegetation are grasses. Trees or shrubs cannot be found in a Temperate grassland. The soils in a Temperate grassland are full of nutrients which is essential for plant growth.

4. Tropical rainforest: This is a rainforest that have tall trees and broad green leaves. The temperature in a tropical rainforest is warm and the atmosphere is moist. A tropical rainforest experiences a large amount of rainfall all through the year.

5. Desert: This is a place where there is no water. Plants find it very difficult to thrive in a biome. The weather is very hot and dry. Any plants that survives in a deserts has very thick cuticles which helps to prevent the loss of water from the plant by evaporation. Examples of such plants are Cactus.

6. Temperate deciduous forest: The leaves in a Temperate deciduous forest are very broad. The trees loose their leaves in a Temperate deciduous forest and also grow them back due to the changes in season such as Autumn, Spring, Winter, Summer.

the answer is c. altitude. hope this ! #brainiac