I would say burning a campfire would contribute most to climate change over the others.
C)
3. IV:height of drop DV:height of bounce CV: type of ball, place where ball is dropped, climate/wind
4. IV: battery type DV: time that it lasts CV: age of batteries, age of material (flashlights), type of materials (flashlights), size of batteries
5. IV:depth of water DV: temperature CV: amount of water in lake, temperature, climate/season
By squeezing the food and pushing it towards the digestive juices in your stomach
You would the find the greatest diversity of species in a temperate kelp forest.
I hope this helps.