Answer:
The reason her grandfather might understand her father better than hers could be because it's his son. Her grandfather raised her father. Which could effect their communication.
B would be the most obvious option.
Our health is crucial when it comes to the environment. The environment can affect our health through physical, internal, and chemical factors. For example, if the environment is extremely polluted, us humans would get sick easily and there would be many birth defects.
Answer:
https://www.csn.es/radiacion-natural-y-artificial2
