Final answer:
Ongka is recognized as the leader of the Kawelka tribe due to his accumulation of wealth, sponsorship of feasts, and assistance with bride wealth. He attracts loyal followers who respect his authority and follows his commands.
Step-by-step explanation:
Ongka, the tribal "big man" portrayed in the documentary, "Kawelka: Ongka's Big Moka," is recognized as the leader of the Kawelka mainly because of his ability to accumulate wealth, sponsor feasts, and help young men pay bride wealth. These actions enable Ongka to attract loyal followers who respect his authority and follow his commands. As a big man, Ongka settles disputes within the community and represents the local people in their interactions with outsiders.