Which one of following pairs is mismatched?

A.Correct option: D

B.Explanation for the correct option.

• Epiphytes are air plants that grow on other plants. They are not anchored in the soil and use rainwater and air as a source of nutrition. They are found in moist tropical areas. Prairie is a grassland of North America where trees and tall shrubs are rare to find and so for this reason epiphytes are not found in the prairie.

   Explanation for incorrect pairs:

   Option (A): Acacia trees are very common in the savanna. The fire-resistant feature of their long taproots helps them survive the drought conditions in the savanna. 
  Option (B): Coniferous forests consist mostly of conifers that tend to be evergreen. Evergreen plants have foliage that remains green and functional for more than one growing season. 

  Option (C): Tundra is a treeless polar desert with long and dry winters. Permafrost is any ground that remains frozen. It is a common feature of the tundra