The first sentence is referring to a secondary reinforce while
the second sentence is referring to primary reinforce. A primary reinforce are
usually base on biological things such as the water we drink or food that we
eat while the secondary reinforce is base on the conditions that humans is
reinforcing such as money or grades.
<span>Unfortunately,
they are immense machines, expensive to move and store, difficult to
test, complex to maintain, and far from secure against vote fraud. Furthermore, a lever voting machine maintains no audit trail. With paper ballots, a it is possible to recount the votes if there is an allegation of fraud.</span>
Answer:
The United States announced a blockade of Cuba.
Explanation:
Yes it's the law trust me I'm sure