Based on the graph below, what is the most likely explanation for what happened halfway through year 15?
rabbits
years
a hot summer
a harsh winter
a sharp increase in available land
a sharp decrease in available land

they each offer a fresh glut of resources to the organisms that can arrive and exploit them. as individuals and new species continue to appear, they actively and passively alter the environment. competition for shared resources increases, local abiotic and biotic conditions shift, and the relative abundances of species change accordingly. the process is called ecological succession, and it is one of the earliest and most well-known concepts in ecology.

i'm pretty sure it's spores

i think it is dna, i'm not totally sure but i think it might be.