Final answer:
The U.S. Equal Employment Opportunity Commission investigates sexual discrimination in the workplace and enforces Title VII of the Civil Rights Act of 1964.
Step-by-step explanation:
The agency responsible for investigating sexual discrimination in the workplace is the U.S. Equal Employment Opportunity Commission (EEOC). The EEOC enforces Title VII of the Civil Rights Act of 1964, which prohibits discrimination in employment on the basis of race, gender, national origin, religion, or sexual orientation. This law aims to ensure equal employment opportunities by protecting employees and job applicants from discrimination. Part of the EEOC's role is to oversee the adherence to these regulations and to provide recourse for individuals who experience unlawful discrimination.