Final answer:
Most hormones are regulated by negative feedback loops to maintain homeostasis and keep hormone levels within a narrow range.
Step-by-step explanation:
The question asks why it would be problematic if most hormones were regulated by a positive feedback loop. Most hormones are actually regulated by negative feedback loops, which help maintain homeostasis and keep hormone levels within a narrow range. Negative feedback brings hormone levels back to normal whenever they start to become too extreme. Positive feedback, on the other hand, causes conditions to become increasingly extreme, which can be problematic.