Unique among animal species, humans use our vocal apparatuses primarily for two separate communicative purposes: to talk and to sing. The question of what cross-cultural traits distinguish these distinct modes, and secondarily what pressures led humans to develop them in the first place, blank neuropsychologist Daniela Sammler’s 2024 study “Signatures of Speech and Song: ‘Universal’ Links despite Cultural Diversity.”
Which choice completes the text so that it conforms to the conventions of Standard English?