Which advantage of genetic technologies would these people most benefit from?

c. magnitude and direction

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.