What arises from the brain and sacral region of the spinal cord?

Iwill give brainiest to first person who gets it ! what are 3 basic types of interactions we see in an ecosystem?

Study the image of this rock.which characteristic best supports its formation from sedimentary processes? it has many layers.it is coarse-grained.its grain shape is round.its texture is non-banded.

Which chemical equation is unbalanced? which chemical equation is unbalanced