The correct answer is B.
Heliocentrism is the astronomical model in which the earth and the planets revolve around the sun. The sun is at the center of the Solar system.
Heliocentrism is opposed to geocentrism which placed the earth at the centre of the Universe.
Heliocentrism developed as early as 3rd century BC but it was not until the 16th century, when it was presented as a mathematical model by the astronomer Nicolaus Copernicus leading to the Copernican Revolution.
