Jawaban:

With this sentence, Mandy states that she will be very unhappy without real food.

Why does Mandy miss real food so much?

Mandy is in the future, in a region where technology is capable of creating food.

These foods are nutritious, but not like real food.

That's because these foods don't have an attractive taste, consistency, smell, or colors.

Although these foods provide the necessary nutrients, they do not promote happiness to the one who is eating.

This makes Mandy feel bad, she feels sad when eating and thinks she can't maintain that kind of life, for that reason she decides to travel back in time, to a time with real food.