Answer:
The correct answer is D. Umbilical cord
Explanation:
The umbilical cord connects the fetus to the placenta and through it exchanges nutritional substances as well as oxygen-rich blood. The umbilical cord is maintained throughout gestation until the moment of birth, when it is cut and leaves a permanent scar, the navel. The umbilical cord is responsible for breathing and feeding the fetus until the moment it is born, so any failure or blockage in the circulation of oxygen and nutrients through the cord can lead to injury or even death of the embryo. It also serves to remove waste and carbon dioxide (CO2).
You might have to be more specific. All of the following structures except what?
Because less animals means less energy that can be used.
One way to protect the biodiversity of local forest ecosystems would be to prevent the logging or destruction of the fire by humans or also by natural disaster such as forest fires. Another way for forest ecosystems to be protected could be working to reduce pollution in nearby areas and also preventing the contamination of the water sources nearby.
