Continuing Evolution Practice Test

In a city park, a population of pigeons includes two alleles at a gene affecting beak depth: D (deeper) and d (shallower). After a shift in available food toward larger, harder seeds, researchers sample allele frequencies each breeding season for 5 seasons. Allele D increases from 0.33 to 0.58. Which observation best demonstrates continuing evolution in the pigeon population?

A population of rabbits includes two alleles at a coat-color locus: W (white) and B (brown). In 2017, snow cover duration decreased due to warmer winters. Researchers sampled the same population each spring: 2016 $f(B)=0.12$, 2018 $f(B)=0.20$, 2020 $f(B)=0.29$, 2022 $f(B)=0.33$. Predators more easily detect white coats on snow-free ground. Which observation best demonstrates continuing evolution in this rabbit population?