____is the imaginary plane that bisects both the earth and the sun. Equatorial plane Meridional plane Plane of the ecliptic Plane of illumination

The correct answer is Plane of the ecliptic.

The plane of the ecliptic is the imaginary plane that represents the path of the Earth as it orbits around the Sun. This plane bisects both the Earth and the Sun and is the reference for defining the positions of planets and other celestial bodies in the solar system. It is important in astronomy as it helps in understanding the relative positions and movements of celestial objects.

The equatorial plane refers to the plane that is perpendicular to the axis of rotation of the Earth, while the meridional plane is associated with the longitudinal lines dividing the Earth. The plane of illumination relates to the division of light and shadow on celestial bodies but is not the correct answer in this context.