Final answer:
Teachers and community members couldn't march in Birmingham due to violent opposition from the police and local authorities. The peaceful protests led by civil rights activists were met with aggression, including the use of fire hoses, attack dogs, and physical force. These actions shocked the nation and increased support for the civil rights movement.
Step-by-step explanation:
Teachers and other community members couldn't March in Birmingham because they faced violent opposition from the police and local authorities. The peaceful protests led by civil rights activists, including Martin Luther King Jr. and the Southern Christian Leadership Conference (SCLC), were met with violence and aggression from the police. The police used high-pressure fire hoses, attack dogs, and physical force against the demonstrators, including children. These brutal actions were captured by television cameras and shocked the nation, eventually leading to increased support for the civil rights movement and federal legislation against segregation.