Question

When a snail is touched it retreats into its shell. This is an example of

Answer 1

Hey! Welcome to Openstudy! (❁´ ▽ ` )ﾉ

I am not really sure, but I think it's called habituation. :)

Answer 2

no. a reproduction
b response to a stimulus
c metabolism
d a unicellular organism

Answer 3

Well. A reproduction would be something like reproducing babies. They are not doing that. I think it MIGHT be a response to a stimulus. A stimulus is a thing that rouses activity or energy in someone or something; a spur or incentive. So it is most probably B. I don't think it's C. And it definitely isn't D. So probably B. :P