The inciting incident, rising action, climax, and resolution are all part of the of a story.
a. exposition
b. plot
c. motif
d. theme

B. plot
exposition is a part of the plot (it explains the background info), a motif is a dominant idea in a story, and the theme is a main topic in a story so the only one that works is plot

As the boys sleep, military airplanes battle fiercely above the island. none of the boys sees the explosions and flashes in the clouds because the twins sam and eric, who were supposed to watch the signal fire, have fallen asleep. during the battle, a parachutist drifts down from the sky onto the island, dead.