PASSAGE 2: BÀI ĐỌC SKILLS UNIT 1-2- BRIGHT 12 SBT - UNIT 1-8

Extraordinary people
There are people in this world who have incredible abilities that seem to break the laws of nature. Here are three real-life superheroes who have amazed the world with their talents.
[I].Wim Hof, also known as ‘The Iceman’, is a Dutch man who has broken the limits of what humans can do in low temperatures. [II]. He has set several world records for his ability to deal with freezing temperatures, including the longest ice bath and longest full-body contact with ice, although those records have been broken many times. [III]. Wim has developed a method of breathing that allows him to control his body temperature and survive extreme cold. [IV]. He has run a full marathon in the Arctic Circle and almost reached the peak of Mount Everest in just shoes and shorts in 2007!
Daniel Tammet, from the UK, is often called ‘The Human Calculator’, due to his incredible abilities to do maths. Daniel can solve complicated mathematical problems in his head at lightning speed. Daniel also has an amazing language learning ability. He can speak a wide variety of different languages, including Icelandic, which he took just one week to learn! He has even written three books about his life and talents.
Stephen Wiltshire. aka. 'The Human Camera’, is a British artist with an incredible ability to draw detailed pictures of cities from memory. Wiltshire can take a brief helicopter ride over a city and perfectly recreate the view in his drawings. He has drawn famous cities like New York, Rome, and Tokyo, and his artwork has appeared in galleries around the world.
These three individuals have shown that human beings can do extraordinary things beyond what we can imagine. Their talents can inspire us to think differently about the world around us and encourage us to achieve great things, even when they might seem impossible!
*aka: who known as

Câu hỏi

What does the word “they” in the last paragraph refer to?