What's the hardest thing about vacation the entire country

Money

Explanation:

Do you mean what's the hardest thing to vacation out of the country or vacation around the entire country? Either way, it varies person from person but for me, it's money. You have to have the gas money and the materials OR have the money to buy access to another country.

answer; the correct answer to the above statement is to increase the production of milk in a herd of milk cows, the highest producing cows were chosen as the mother;

the technology changed agriculture in an impacting manner since many people left the field work by a cellular or other technological appliances