Which of these is a response to an internal stimulus?

a.A sunflower turns to face the rising sun.

b.A cucumber tendril wraps around a wire.

c.A pine tree knocked sideways in a landslide grows upward in a bend

d,Guard cells of a tomato plant leaf close when there is little water in the roots.

Answer :

A because if u look at the other answer they don’t make senced
It’s A I did this before

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