What is the following key word used for? later choices: sequence adding an idea explanation or illustration emphasis and purpose time repetition and summary

The key word "later" is used to indicate sequence.

Explanation: "Later" is a signal word, which means that "later" is capable of establishing a relationship between ideas that are presented in one or more sentences. The type of relationship that this key word can establish is "sequence", which consists in presenting events in a specific order. In that way, "later" can be used to indicate that an event took place before another one.  

a: that she is losing interest in her relationship with arobin just took !