Fertility rates and resources are connected because in areas where there are scarce resources and high fertility rates there will be problems in the ability to provide for the members of this hypothetical society. Therefore, individuals or animals could potentially live shorter and less healthy lives because of the lack of proper resources such as food, water, healthcare, or education.
An astronaut is able to float slightly on the moon due to the gravity, the gravity being 1.62 m/s² which would be lighter then the earth's which is 9.78 m/s².