What is the main cause of poor air quality and acid rain? 1-Trees and greenhouse gasses
2-Water vapor and sulfuric acid
3-Deforestation and methane gas emission
4-Greenhouse gasses and smog

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

Models are non-visual ways of coummincating how someone thinks about something in the natural world

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.