Question

what is the meaning of the foreign expression in bold?
deltochilum valgum, a species of dung beetle, prefers to eat millipedes rather than dung. the beetle uses its long back legs to grab the millipede’s body before delivering the coup de grâce: it decapitates the millipede with its clypeus, a sharp plate on its face that acts like a chisel.
options:
an action that overwhelms something that has been flourishing
a destructive or catastrophic chain of events
a finishing blow to something that has been getting worse or weaker
a deciding factor that significantly changes an event’s outcome

Explanation:

The context describes the dung beetle delivering a final, fatal blow (decapitation) to the millipede after grabbing it. This matches the definition of a finishing strike to a vulnerable target.

Answer:

a finishing blow to something that has been getting worse or weaker