The more experienced you’re, the less you’ll have to explain anything cause you start to understand how to work out “SHOWING”. Showing is more taxing than explaining. Nonetheless, explaining also requires a certain level of ability. Not everyone can explain things in a comprehensible way. There are those whom being masters in Chemistry, have no idea how to explain why is it that water is a vital liquid. Which is why if you’re barely starting, you might have to explain.