What can space exploration teach people about safeguarding earth's environment?

Synthesizing new ideas from a speaker with what one already knows about the subject to see if the information makes sense is an example of a) questioning and challenging b) identifying differences c) forming a statement d) seeing the broader context

Which sentence from this passage explains what the main characters do in rosencrantz and guildenstern are dead? "tom stoppard's play, rosencrantz and guildenstern are dead, draws on two previous theatrical works: shakespeare's hamlet and samuel beckett's waiting for godot." "as in beckett's play, rosencrantz and guildenstern pass the time by impersonating other characters, engaging in word play, and remaining silent for long periods of time." "these same two characters were also featured in a parody of hamlet, the short comic play by w. s. gilbert entitled rosencrantz and guildenstern." "gilbert's play makes rosencrantz and guildenstern into central characters and alters the storyline of hamlet."

What is a brief and often humorous statement of truth or opinion, such as "a watched pot never boils"