order, sequence / system, procedure

handle, manage, deal with

to select; to choose

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

one day

one, 1 / the first in order, foremost / the beginning / the best / a kind of; one of something / (card games) an ace / unity / the bottom string of a shamisen or other Japanese musical instrument

selection, choosing, especially selecting what's necessary and deciding to accept or reject

make a choice, sift

axiom of choice

natural selection