Part 3 is included because it is a critical point in the act. Because of discrimination on multiple factors (including race, gender identity, sexuality), people are not able to, as the passage states, "compete on an equal basis". To prevent segregation, acts are made to try and eliminate any kind of way that a person can be discriminated against. This is why the authors include Part 3.
Answer:
We would be wise to adopt principles that help us live less distracted. However, these distractions are easy to notice. We readily admit that we spend too much time
checking e-mail, watching television, or playing games on our phone. After all, the battle plays out in front of us each day.
Explanation: