Which would NOT be considered a reliable form of communication? Yelling. Alarms. Cell phones. Two-way radios.

Yelling would NOT be considered a reliable form of communication. While yelling can sometimes be effective in getting someone's attention, it is not consistent or dependable due to factors such as distance, background noise, and the potential for misinterpretation. In contrast, alarms, cell phones, and two-way radios are designed specifically for clear and reliable communication.