I believe it’s A. If it is not than I am sorry
Answer:
The answer is option b. sacral bones.
Explanation:
The sacral bones are a shaped like a triangle and found below the fifth (5th) lumbar vertebrae and in between the hip bones. The joint formed with the hip bones is called the sacroiliac joint.
Accio crab, Ancient otter, Skywalker gibbon Thats all I know anyways hope this helps
Provided that there's no diagram, most molecules have particular areas on the molecules, called the "active area" that act as a lock to a particular substrate's molecular structure, providing the key.
An enzyme's active area is only able to be "unlocked" by a certain substrate's "key".