Which of the following is considered an adaptation of plants?

The adaptation of plants refers to specific features or characteristics that enhance their survival and reproduction in particular environments. The waxy leaves of a cactus are an excellent example of such an adaptation. Cacti are typically found in arid environments with limited water availability. The waxy coating on their leaves reduces water loss through evaporation, allowing them to conserve moisture. This structural adaptation is crucial for their survival in harsh conditions where water is scarce.

While thorns on roses, bright flowers for pollination, and deep roots in grass are all adaptations that serve specific purposes, the waxy leaves of cacti are particularly significant when considering the adaptation to extreme environments. The thorns protect against herbivores, bright flowers attract pollinators, and deep roots help with water absorption; however, none of these features specifically address the critical issue of water conservation in the same way that the waxy leaves do for cacti.