Answer:
Later sequence is used for modifying the objects of the sequence.
Adding an idea means making an addition of a new thought or idea in the already made plan.
Step-by-step explanation means giving description of the things.
Illustration means showing something with the help of evidences or so.
Emphasising means putting force on the certain point or the topic.
Purpose time repetition means repeating the words for specific purpose in the continuous course of time.
Summary means composition of the entire topic.