Final answer:
To explain a father's return time to a preschooler, use familiar events instead of specific times, such as 'Your daddy will be back after you eat.'
Step-by-step explanation:
When explaining to a preschooler when their father will return, it is important to relate time in a way that is easily understandable to them. Since preschoolers may not fully grasp the concept of specific times such as '7 pm,' it is better to use events they can recognize, like meals or daily routines. Among the options provided, the best explanation would be:
'Your daddy will be back after you eat.'
This associates the father's return with a familiar event in the child's day, which is likely to be more meaningful than an abstract time.