Данная задача требует преобразования слов, напечатанных заглавными буквами в тексте, чтобы они грамматически соответствовали содержанию. Вот исправленный текст:
Dogs and Humans The dog is considered to be the best friend of man. This is because they are loyal and friendly. Scientists say that growing up in an environment that is SURROUNDED by animals can help to create a better immune system. A dog is one of the world's MOST POPULAR pets. Dogs LIVE with humans for over 12,000 years. THEIR roles were hunting companions, protectors, and friends. The Siberian Husky is one of the dog breeds which LOOK like a wolf. Despite this fact, they are very friendly with families and strangers. Dogs even travelled to space. Strelka and Belka WERE the first animals to orbit the Earth and safely land on the Soviet Sputnik 5 mission in 1960.
Теперь текст грамматически корректен и соответствует содержанию задачи.