Darren is a 12-year old active boy. sometimes when his friend simon cheats on the game, he tends to get irritated. but darren tries to hold his anger and reasons out to simon why it is bad practice to cheat. which developmental aspect is darren displaying in his actions

When Darren, who is a 12-year old active boy, tries to hold his anger and reasons out to Simon why it is bad practice to cheat Darren is displaying self-regulation. This means that Darren is able to control emotions, handle frustration and resist impulsive behavior and to act in a way that considers long-term consequences rather than just transient feelings.

explanation:

may i ask what challenges?

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."