C) the sun warms the ground.
The thickness of the uterine lining becomes very thick when the level of the hormone progesterone reaches its highest levels. this makes sense based on the function of progesterone, as it is necessary for the implantation of the zygote.
I would go with B) Nerves in the finger detect stimuli and send the message to the brain.
An independent variable is the one that you change and the dependent variable that changes when he independent variable changes.
Answer:
evolution of bipedalism in homo sapiens
