What is co-extinction? Explain with a suitable example.

(N/A) Co-extinction refers to the process where the extinction of one species leads to the inevitable extinction of another species that is obligatorily associated with it.
$1$. Parasite-Host Example: When a host fish species becomes extinct,its unique assemblage of parasites also meets the same fate because they cannot survive without their specific host.
$2$. Plant-Pollinator Example: In cases of coevolved plant-pollinator mutualism,the extinction of the plant species leads to the extinction of the pollinator,and vice versa,as they depend entirely on each other for survival and reproduction.