To have three main points your writing about in your topic. For example.... Timmy likes bread because it's tasty, delicious, and healthy
Can you post the actual question with the shown sentences?
Answer:
Lewis thinks it is unfair that the team leaders are receiving better and higher treatment, though they haven't done the same amount of work and perspiration as the other team members.
Explanation:
You need to give more information with the question
Jellyfish swim in groups and are causing ecological issues and health threats to people, but people are finding different ways to fix these problems