Final answer:
The key factor that influences an Apache Indian's decision to speak or not speak is cultural identity and language preservation.
Step-by-step explanation:
The key factor that an Apache Indian decides to speak or not speak is cultural identity and language preservation. The Apache people have a strong sense of cultural pride and view their language as an integral part of their identity. They may choose to speak their native language to maintain their cultural heritage and pass it on to future generations.
Additionally, speaking or not speaking Apache may also depend on the context and the individuals the Apache person is interacting with. For example, an Apache person may choose to speak Apache when communicating with other tribal members or in ceremonial settings, while using English or another language in more formal or professional settings.
Overall, the decision to speak or not speak Apache is influenced by cultural preservation, identity, and the specific social context in which the Apache person finds themselves.