Concept:Agricultural extension methods are classified as individual, group, or mass methods.
A method that reaches one farmer at a specific time belongs to the individual category.
Explanation:A farm visit is an individual method.
In this method, an extension worker goes to a farmer's farm at a particular time to give personal guidance.
Film shows and electronic media are mass methods because they reach many farmers at once.
A field trip is a group method, as it involves several farmers moving together to a location.
Therefore, the method aimed at reaching an individual farmer at a particular time is a farm visit.
Answer:B. farm visit