It seems like you are asking about how animal hearts (or animals in general) in the Sahara adapt to their environment. To clarify, animals do not physically move to cities or change their lifestyle in an anthropomorphic way. However, they do have adaptations that allow them to survive in harsh environments like the Sahara.
Here are some potential adaptations:
A. Nomadic lifestyle: Many animals, such as camels and certain species of antelope, have a nomadic lifestyle where they follow seasonal patterns of food and water availability. This adaptation helps them survive in the arid conditions of the Sahara.
B. Physiological adaptations: Animals might develop specific physiological traits, such as larger hearts or more efficient circulatory systems, to cope with dehydration and temperature extremes. However, this is more about each species being genetically adapted to their habitat rather than moving locations.
C. Migration: Some animal species may migrate to different areas during certain seasons to take advantage of more favorable conditions, such as moving to the Sahel or regions with better resources.
If you are referring to specific animals and their ways of coping with their environment, please provide more context, and I would be glad to help further!