What is the fine-grained topic of the following text: The wildness of the Sahara blesses the plants it harbours, forcing them to adapt, evolve and thrive by creating life and energy such as the gift which is the Moroccan Tree of Life- the Argan tree, and other wonders. Only return the topic.
Adaptation and survival of plants in the Sahara Desert with a focus on the Moroccan Argan Tree.