How can you determine how much energy a food item contains?
a. taste the food
b. weigh the food
c. look at amount of calories
d. look at what color the food is

preservation because he preserves part of the land and preserves means save

explanation:

answer; both surfaces of the membrane are nonpermeable

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.