Answer:
A. An intermittent reinforcement schedule
Explanation:
Renaissance art used humanist ideas by focusing on the secular and human forms as well as nature and other worldly subjects rather than focusing on religious imagery which dominated artwork prior to this period in Europe.
Answer:
Expansionists during the westward expansion. Something about manifest destiny.
A lot of farmers use machines like tractors and plows ect. There is also specific ways to get specific plants out.