What makes an electron electrically balanced?

Would really appreciate it, i have an idea but not completely sure

Flock x flock y flock z total pieces of food eaten (from previous page) 147 93 60 food percentage* % % % simulated number of birds in flock for 3rd generation** * divide each flock's total pieces of food by 300, the total number of pieces of food eaten. ** multiply the food percentage for each flock by the total number of birds (30).

Based on the data in your tables, did the light-colored moths have a higher or lower survival rate after the industrial revolution?