The answer is b. Hope this helps :)
It could occur after a forest fire or flood.
As the organization and management of resources and responsibilities for dealing with all humanitarian aspects of emergencies, in particular preparedness, response and recovery in order to lessen the impact of disasters.
The answer is; a high neutron-proton ratio
Isotopes have the same number of protons (atomic number) but differ in the number of neutrons (hence also in their mass numbers). Isotopes are named according to their mass numbers; example carbon-12, and carbon-14. Their atomic numbers remain as 6 but neutron numbers differ (6 and 8).
