Diet

[daisy1352]

I need the meaning of the red parts.
Imagine how the cook feels when you pull a face and say you don't fancy it or you're not really hungry. Not only that, your parents are probably anxious to see that you have a properly balanced diet.Thanks

[dodonaomik]

Not only that, your parents are probably anxious to see that you have a properly balanced diet.Thanks

I guess the meaning is that:

otherwise,your papa and mama will worry about your diet.

[RonBee]

Say:

make a face

[David L.]

'diet' is most often used these days to refer to restricting oneself to special meals, and not eating certain foods, either to lose weight or for medical reasons.
'diet' also refers to the kinds of food that a person, animal, or community habitually eats. This is the meaning used in the sentence you quote.
There are many foods customarily eaten in a country; but each day, we should choose from all of these so that we take in enough complete protein, and the right proportion of carbohydrates and fats; of vitamins and minerals. If a person is 'picky' and doesn't want to eat carrots, then they won't get the vitamin A that day that they need. If they don't eat yellow vegetables at all, and only drink skim milk, they are really in trouble unless they take a supplement in a capsule.
So - if the person is refusing a food, or 'not hungry' and eating little, the parents are going to be concerned that the person is not taking in the nutriment that they need to keep the body healthy.
your parents are probably anxious : with the meaning of both 'concerned' and 'keen, desirous'
to see : with the meaning, 'to ensure/to make sure'
that you have a properly balanced diet. : as per above.

[ladybird987]

Say:

make a face

but: "pull faces" is OK ?

[RonBee]

but: "pull faces" is OK ?

I had never heard "pull a face" before. You can make a face or put on a face, but "pull a face"?

[Raymott]

but: "pull faces" is OK ?

"Pull a face" is very common in this context where I come from.
Kids often pull a face when they're given broccoli.

[RonBee]

"Pull a face" is very common in this context where I come from.
Kids often pull a face when they're given broccoli.

Make a face - AE
Pull a face - BE

[ladybird987]

Both, Cambridge and Longman say "make/pull a face" - not precising the country. Dictionaries are lying :[ :P

[Anglika]

No, they are just selective.

Both make a face and pull a face can be heard in BrE.

He made a face when asked to eat broccoli.

If you pull that face, the wind might change.

As to the original sentence, the phrase "pull a face" is fine'; it could equally well be "make a face".