How do organisms differ in the ways they obtain their energy source or food

They either eat other organisms, or they produce their own food..

The organism is either autotrophic or hetertrophic. There are 2 kinds of each. So 4 different ways over all. But may be too advance for you, I'm a bio major

Idon’t know i kinda don’t like chemistry

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