Plz answer quickly will mark brainless

You are reading an informational text for english class, and you find a lot of words you don't know. your teacher says you don't need to look up all of them in the dictionary, only the ones you need to get the main point of the text. how could text features you figure out which words to look up?

It was a bitter cold saturday morning ,the young track star dressed for his daily five mile run

The travels of marco polo. which sentence best reflects author’s subjective perspective on the people of japan?