Answer:
2) Discrimination 
Step-by-step explanation:
Discrimination means treating an individual unjustly on account of who they are or on account of having some type or different characteristics. 
 The 2010 Equality Act highlights these characteristics: 
- Age and Gender,
- Race, Disability and Religion, 
- Pregnancy and Maternity, 
- Sexual orientation reassignment ,
- Marriage and civil partnership, 
Zulu is extremely negatively treated because his boss believes he belongs to a specific group of people with protected characteristics.