Abiotic factor is defind as a nonliving condition such as climate, rain, wind, temperature, altitude, soil or habitat, which influences and affects an ecosystem and the organisms in it.
The abiotic factor that contributed to the evolution of this set of behaviors as mentioned in the question is cold winter season.
For example: GGATACCTAGGTAAT
Insertion: GGAT<u>G</u>ACCTAGGTAAT
a nucleotide that was not present before is inserted into the original sequence
Substitution: <u>C</u>GATACCTAGGTAAT
the first nucleotide was substituted in for another (C for G)
Frameshift (basically a insertion or deletion, we'll try deletion here): GATACCTAGGTAAT
the first nucleotide was deleted, causing the reading frame to be shifted (instead of GGA as the first codon, we have GAT)
