What type of evidence is the best indicator of how closely two species are related

If you touch a hot light bulb and get burned, that is an example of a. radiation b. convection c. conduction

What’s #16 asking and how do i solve it?

Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive