answer:Just a few off the top of my head…(and I’m not a scientist… I just took several years of high school biology and watched lots of Bill Nye :) -Dead leaves, animal corpses, etc. would pile up so that you literally could not see the trees in the forest. There would still be bacteria and fungi to help stuff decompose, but insects play a major role in this. -It would disrupt the entire food web in ways I can’t even fathom. Everything from fish to birds to lizards to monkeys eat insects. This might cause many species of animals to go extinct. -OMG agriculture! The bees, which are responsibly for pollinating many human-food plants, are already dying (in the U.S.; I’m not sure about in other countries.) And insects pollinate many plants. Some plants can only be pollinated by insects, so they too would go extinct presumably. I often find myself wondering why ticks and mosquitoes have to exist though…