cooking
smash, not the most complex but it has a few sub-routines
A closed skill is often more complex than an open skill.
A life skill is a skill that is necessary in everyday life. This skill may be cooking a meal for example.
A classic example of a humorous and exaggerated stereotype about an unusual or impractical skill is the joke about "rocket science," implying that something is extremely difficult or complex by comparing it to the challenging nature of rocket science.
He is quite skilled in the use of the bayonet.
its complex there are alot of things you need to do in order to master this stroke!
Science uses drawing as a skill because some complex ideas can be more easily transmitted in pictographic form. For example, Feynman Diagrams show particle interactions in a clear and concise manner that words have difficulty relating as well.
communication
Making models
science skill
Front crawl, I think that you mean freestyle. It is the basic skill all swimmers should have mastered. But all of swimming is complex to some degree. Enough strength, diving, form.
A bicycle is an example of a complex machine.