What of the following describes how an organism responds to external stimuli
1.a person yawns when oxygen is low in the lungs
2.the pupil of the eye gets larger when exposed to darker conditions
3.a dog eats food when its hungary
4.a woman drinks water when she is thirsty

Research question: why are the carrots that grew on the left side of the garden larger than the carrots that grew on the right side of the garden? which hypothesis is based on this research question? a comparison of people with gardens to people without gardens will show who is likely to live longer. b. carrots are thought to be good for your eyesight and should be eaten regularly. c. carrots that are provided lots of sunlight grow to a larger size than carrots grown in the shade. d. eating fresh vegetables every day is a healthy thing to do.