Achange in an organism's surroundings that causes it to react is called

a. a response
b. energy
c. a stimulus
d. development

A change in a organism's surroundings that causes the organism to react is called a stimulus

Ifound this on google “according to the findings, a foramen magnum positioned toward the base of the skull is found not only in humans, but in other habitually bipedal mammals as well.” i hope this you for what your looking for