A. The onset of the menstrual flow
The atom you are discussing here is Nitrogen.
Nitrogen has an atomic mass of 14.007
Brainliest please :)
This change best illustrates the 3rd answer choice, Loss of Habitat.
The plants aren't migrating, but are rather only surviving in areas where there is enough moisture to support life. The wildflowers are not adapting to grow in dryer conditions, and the species is not going extinct, as there are still some areas where the plants can get enough moisture.
Hope this helped!
C. aquifer: it’s a permeable rock that can contain or transmit ground water