You got the idea! Now let’s correct the mistakes in your answer:

1. The fashion today is quite more informal because the people can wear to go to work comfortable, and only wear clothes more serious for (?) events.

1.Fashion today is quite more informal because people can wear comfortable clothes to go to work and more formal clothes for other events.

The concept of «hot colours» and «cold colours» doesn’t exist. We talk about «warm colours» including red, yellow and orange and «cool colours» including blue,green and purple. For colours such as black, grey or brown, we can talk about «dark colours».

Let’s correct your sentence now:

2.The people wear for work less formal clothes and hot colors while the people wear the cold colors for different events as celebrations.

2.People wear less formal clothes for work and warm and cool colours while people/they wear dark colours for events such as celebrations.

Correct answer. Let´s correct the grammar mistakes in your answer:

No he doesn’t. He wears sport clothes almost ever because today it’s fashion and confortable and is very popular among young people even when they go to party.

No he doesn´t. He almost always wears sports clothes because they are fashionable and comfortable and very popular among young people even when they go out and party/go to a party

Revise the position of frequency adverbs
Revise the use of almost

Correct answer! Now let´s correct the mistakes in your answer:

No, they don’t. The teenager choose their clothes because they like to have (?) own style and to be fashion

No, they don´t. The teenager chooses their clothes because they like to have their own style and to be in fashion/on trend.

Correct answer! I would have probably answered «because children usually wear branded clothing which is exclusive» Why? Because according to «Oxford Learner’s Dictionary» we must use «branded» only before nouns.

Correct answer! Now let´s correct the mistakes made:

Because it’s more informal,comfortable and we can be used for men and women. If she can wear clothes his boyfriend like, shirts and t-shirts

Because it´s more informal, comfortable and it can be used by men and women. The writer says that she often wears his partner´s clothes such as shirts and t-shirts.

Correct answer! Now let’s correct the mistakes in your sentence:

The children like wearing as fashion as adults and for this reason they choose designer labels and they have their own style. Now children spend a lot of money buying clothes

Children like wearing on trend like adults…..

Correct answer, but you answer has mistakes:
In the past people have rules for dressed,…

In the past people had (some) rules to know how to dress/a dress code,..

Correct. Mistakes to be corrected:

People can wear informal clothes in the colours that they prefer, for example(?) a white T-shirt(?)some jeans and trainers are a good look to go to work.

… for example, a white T-shirt, jeans and trainers are…..

The lack of commas can affect comprehension when we read.