Circle a word or phrase in each set of options to complete the explanation of why the
length of horns of these cattle most likely increased while they were living in the wild.
The population of cattle likely had (no / some ) genetic variation causing (all cattle to
have long horns / some of the cattle to have longer horns than others ). Long horns are a
( beneficial / harmful ) trait. Cattle with longer horns are (less / better) able to survive
and reproduce