Final answer:
A) Right and Left Halves
The parasagittal plane divides the body into unequal right and left sides, which is the correct answer to the student's question.
Step-by-step explanation:
The parasagittal plane can be described as an imaginary field running through the body which divides it into unequal right and left sides. This is different from the midsagittal, or median, plane which would divide the body into equal right and left halves. The parasagittal plane is different from the frontal (coronal) plane, which divides the body into anterior and posterior halves, and from the transverse plane, which divides the body into upper and lower portions.
The correct answer to the student's question is: A) Right and Left Halves. However, since it specifies the 'parasagittal' plane, the more precise answer should note that the body is divided into unequal right and left halves as opposed to equal halves which would be the result of a division by the midsagittal plane.