Assume, for the sake of argument, that life requires conditions similar to those on Earth and that the evolution of life would follow a similar course to that followed on the Earth. Discuss this with your neighbors and write some of your conclusions below and on the other sided of this page. To guide your thinking, imagine what would happen if you replaced the Sun in our Solar System by a star of each spectral type. These high temperature stars emit most of their light in the ultraviolet. They evolve too quickly, and so they probably do not live long enough for life to develop in a planet that orbits them.
M stars are cool and faint.
In order to develop life, planets would have to be close to be warm. However, M stars have relatively strong coronae.