What principle of animation is used to animate the movements of the arms of the following character while walking?

the movements of the character's arms follows a(n) to create more natural movement.

I'm dead lol: a professor was traveling by boat. on his way he asked the sailor: “do you know biology, ecology, zoology, geography, physiology? the sailor said no to all his questions. professor: what the hell do you know on earth. you will die of illiteracy. after a while the boat started sinking. the sailor asked the professor, do you know swiminology & escapology from sharkology? the professor said no. sailor: “well, sharkology & crocodilogy will eat your assology, headology & you will dieology because of your mouthology.

Which is the most challenging aspect of developing a screenplay? finding an original idea collaborating with a script doctor establishing the key elements of plot selling a finished screenplay

Describe the characteristics of men’s hand.