I think it should be D. A loss in biodiversity due to catastrophic event.
Answer:
Cancer is unchecked cell growth. Mutations in genes can cause cancer by accelerating cell division rates or inhibiting normal controls on the system, such as cell cycle arrest or programmed cell death. As a mass of cancerous cells grows, it can develop into a tumor.
Hope I helped! :)
My guess is latin, it is more of a specialized language with limited uses
Respiratory droplets produced when an infected person coughs, sneezes or talks.
The answer is electric force!