Which act requires schools to need to develop grievance procedures for complaints?

Title IX of the Education Amendments is the correct answer because it specifically mandates that educational institutions develop grievance procedures to address complaints of discrimination based on sex. This act ensures that students have a clear, equitable process for reporting instances of sexual harassment or discrimination, which is crucial for maintaining a safe and inclusive educational environment.

Title IX's focus on addressing gender-based discrimination has led to policies that require schools to not only respond to complaints but also to provide a transparent process that students can access easily. This requirement reinforces the principle of accountability, encouraging schools to take complaints seriously and investigate them thoroughly.

In contrast, the Equal Pay Act primarily focuses on wage equality, while the Americans with Disabilities Act centers on ensuring equal access and reasonable accommodations for individuals with disabilities, and the Civil Rights Act encompasses broader discrimination protections across various categories but does not specifically mandate grievance procedures for educational institutions like Title IX does.