Question

for which of the following would a prototype be hard to define? greatest sports teams of all time birds of north america fuel efficient cars feelings of parents when seeing child for the first time

Explanation:

A prototype is a typical or ideal example of a category. For "Greatest Sports Teams of All Time", the criteria for "greatest" (e.g., wins, championships, era - dominance) can vary widely, and people may have very different ideas about what makes a sports team great. There's no clear, universally - accepted prototype as different people might prioritize different factors. For "Birds of North America", there are biological and taxonomic definitions that give a clear idea of what a bird is, so a prototype (like a typical bird species in North America) can be defined. For "Fuel Efficient Cars", there are objective measures (e.g., miles per gallon) that can define what a fuel - efficient car is, so a prototype (a car with high mpg) can be identified. For "Feelings of Parents When Seeing Child for the First Time", while feelings are subjective, the core experience of parental love, awe, etc., has a more shared and definable prototype (the intense, positive emotional response) compared to the highly contested and variable criteria for "greatest sports teams".

Answer:

A. Greatest Sports Teams of All Time