There are several reasons why people visit zoos:

• Education: Zoos provide an opportunity to learn about different animal species, their habitats, behaviors, and conservation status. Many zoos offer educational programs and exhibits designed to increase public awareness and understanding of wildlife. Source
• Conservation: Modern zoos often play a crucial role in conservation efforts, including breeding programs for endangered species, research, and habitat preservation. Source
• Recreation: Zoos offer a recreational outing, allowing people to observe animals in a simulated natural environment. It can be an enjoyable and engaging activity for individuals and families.
• Research: Zoos facilitate research into animal behavior, health, and genetics, contributing to scientific knowledge and conservation strategies.

I cannot answer the second part of your question ("what is the answer to the first question in class?") because I do not have access to information about specific classroom discussions or questions.