The relationship between the ideas in this sentence is time order.
The relationship between the ideas in this sentence is "time order." This means that the events described in the sentence are presented in the order they occurred, with the first event happening before the second event. In this case, the children spent an hour in the reptile house before moving on to the aviary. To determine this relationship, you can look for words or phrases that indicate the sequence of events, such as "before" or "after." In this sentence, the word "before" indicates the order in which the events took place.
