When the southern hemisphere is tilted towards sun, it is summer in the southern hemisphere and winter in the northern half of Earth, while on the other hand, if the northern hemisphere is tilted towards the sun, there is summer season in the southern hemisphere and winter in the northern hemisphere. When the earth's axis is more or less perpendicular to the incoming rays of the Sun this will leads to the spring and autumn season in some locations of the earth.
Probably how to prepare for college or job interviews- they're going to go into college next and get a job soon. They don't need to think so far ahead into retirement or getting a house yet. Jet engines sound kind of odd in this category too.
A medical specialty concerned especially with the ear, nose, and throat and related parts of the head and neck. This is by merriam webster I had nothing to do with this.