Which of these changes to a modern lifestyle would promote the development of more-sustainable practices in the world food system
a. eating more processed foods
b. buying fresh fruit year-round
c. switching from beef to soy
d. eating fresh vegetables year-round

c. switching from beef to soy

Explanation:

Switching from beef to soy shall lead to the curbing of lifestyle diseases such as obesity.

At the same time, soy shall provide the nutrients that were needed by the body and could be obtained from beef.

Beef is much expensive compared to beef, thereby, there shall be experienced  low expenditure compared to beef.

Therefore the switching from soy to beef shall be a more sustainable food system.

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.