Since her grandmother's recent illness, Sarah has a heightened awareness of her family's health, and gets overly worried anytime a family member appears the least bit unwell. This is an example of .

Sensitization

Explanation:

Sensitization refers o the process in which, following prolonged exposure to the same dosage of a specific physiological,  behavioral, or neuronal response increases over time. In simplest terms, it means giving somebody any experience or awareness of a specific issue or situation so they can quickly find it and understand it. As per the question, the illness of Sarah's grandmother led her to feel sensitize about the health of other family members.

answer; i believe it was by president pranab mukherjee or by the chief justice of kerala high court; ///plz check luck