Question

We are able to do the following activities,
Bending forward
Bending backwards
Bending sideways
Twisting at the waist
It is possible only because our backbone
A. is entirely made up of cartilage
C. is a single, long curved bone
B. is made up of small bones
D. functions like a hinge joint​

Answer 1

Answer:

Here is your answer...

D. functions like a hinge joint.