What discoveries in the history of mankind do you regard as breakthroughs? What inventions in the history of mankind do you regard as most important?

Нужно ответить по-английски на вопросы: What discoveries in the history of mankind do you regard as breakthroughs? What inventions in the history of mankind do you regard as most important?

Choose the correct one comparing and giving explanation. 1 The most / most animals can communicate. 2 dogs are the most / most intelligent animals. 3 the most / most people like to keep pets at home 4the most / most dogs have an easy life in the USA.

What inventions in the history of mankind do you regard as most important?

Помогите ответить на вопросы по английскому! What discoveries in the history of mankind do you regard as breakthrough?

What inventions in the history of manking do you regard as most important?