Science-HELP ME IDK THE ANSWER TO THIS

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

What type of electromagnetic radiation has a shorter wavelength than blue light

Element before carbon on the periodic table