Oscar Schmidlap was not very smart, but he was strong. His father recognized early where his son’s talents lay. When Oscar was 15, his school offered him early morning classes to help him with his academics. His father said no. Instead, his father instructed Oscar to stay home and care for a just-born baby cow. The male calf weighed 85 pounds when born — not much for a strong farm kid like Oscar. His father told him every day that he was to lift up the baby bull 10 times. After only two years, Oscar became amazingly strong and could lift a full-grown bull.
Which term below would account for this situation?