The body is divided into anterior and posterior portions by the plane.

The plane that divides the body into anterior and posterior portions is known as the Frontal or coronal plane. Frontal or coronal plane is a vertical plane that runs perpendicular to the sagittal plane dividing the body into two parts the front (anterior) and the back (posterior). The Frontal/coronal plane extends though the body axis that is along the body’s length. When the subject is standing in anatomical position, the frontal plane extends in a vertical direction.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.