Based on this i would say working hard is an important life skill however I feel like if I read the whole thing my answer would differ but I'm certain based on this paragraph that it isn't the last option but I haven't read the whole story so I'm not sure I would go with Working hard is a important skill
<h2><em>It's a developed country with elaborate infrastructure, high quality of life, and technological innovation. Japanese learned to work and build efficiently and to focus on mental capital rather than material wealth. Japanese relied on economic liberalism and private industry to make the necessary technological leaps.</em></h2>
