The moth on the left has an inflatable "hair pencils," which release pheromones to attract mates from long distances, and the moth on the right, has a very long proboscis (mouth part) allowing it to reach the nectar in an orchid in Madagascar that has 30 cm long nectar tube.

These traits would be considered (a/an) ____________.

a
tendency toward perfection
b
acquired characteristic
c
artificial selection
d
adaptation