Read the excerpt from “primates, empathy, and making connections.”

below my office window at the yerkes primate center, i often hear my chimps laugh during rough-and-tumble games, and i cannot suppress a chuckle myself. it’s such a happy sound. tickling and wrestling are the typical laugh triggers for apes, and probably the original ones for humans. the fact that tickling oneself is notoriously ineffective attests to its social significance. and when young apes put on their play face, their friends join in with the same expression as rapidly and easily as humans do with laughter.

which phrases from the excerpt show the author’s stylistic choice to use specific words so the reader can picture the actions of the chimps?

select all that apply.

primates, empathy, and making connections

laugh triggers

rough-and-tumble games

play face

tickling and wrestling