Hello. You did not present the text to which this question refers, which makes it impossible for it to be answered. However, I will try to help you in the best possible way.
As shown in the question above, cause and effect relationships occur when one event causes another event to exist. Although generally, the first event presented is the cause and the second event is the effect, this order can be changed, which shows that this tip is not very reliable. Ideally, you should recognize this type of relationship when the text presents an event that occurred as a result of another event.
For example:
In the sentence "Pain was the reason for my collapse" we can see that the word "pain" was the event that caused a "collapse". In this case, the first element is the cause and the second element is the effect. However, in the phrase "The clothes got wet because of the rain," we can see that rain (the second event presented) was the cause of the wet clothes (first event presented).