Hugo is testing the idea that moths are attracted to the heat of campfires. he watches a three-foot by three-foot area around an unlit camp fire for one hour and counts how many moths enter the area. he then lights the fire and counts how many moths enter the area for another hour. hugo finds that 5 moths entered the area before the fire was lit, but 26 moths entered it after it was lit. he concludes that moths are attracted to the heat of fires. which of these is an alternative explanation for hugo's results?