He picked up the apple.
Hope I've helped :)
I believe its the first one and the fourth one. i may be wrong tho :/
A random sample is a subset of individuals that are randomly selected from a population of interest. Because researchers usually cannot obtain data from every single person in a group due to time, costs and other constraints, a smaller portion is randomly chosen to represent the entire group as a whole. The goal is to get a sample that is representative of the larger population.
Is Wendy because the subject is the person or thing that we are talking about