Arthur is looking forward to having more time for leisure pursuits after retirement. he is excited about trying out new options. arthur should know that leisure activities pursued during retirement typically focus on

   Hobbies and long life interests

Explanation:  Usually people during their working life do what they have to do to make money, sometimes it has to do with what they like to do, sometimes they don't. Either way, most people do not have that much time to do what they really love, because in addition to their work responsibilities, there are obligations to raise children, which can also help keep people away from the things they love.

Retirement for many means that they can finally devote themselves to what they love, and are quite excited about the fact that they then finally have the time and opportunity to experience it.

giant impact theory - the moon was formed from the collision between earth and another mars-sized body.

colliding planetesimals hypothesis - the moon was formed from the same cloud of material as earth.

capture hypothesis - the moon was locked into orbit by earths gravity as it was passing by it.

accretion hypothesis - the moon was formed from collisions and combining of planetesimals.

i think this is right, if not and you know better let me know.