Does forces of attraction between particles increase or decrease when heated or cooled​

Forces of attraction between particles increase when they are being heated or cooled because they become closer together.

what words? are you talking about to complet what sentence

swahili is an extremely rich and complex civilization, a set of ethnic groups articulated by a language and a series of cultural elements that fuse the african traditions, islam and indian culture. this growth was largely a result of the indian ocean trading network that brought in not just man-made riches, but also religious ideas, specifically islam, which had a significant impact on the local culture. furthermore, the development of the swahili language gave a common cultural unity to the people.