Answer: Cause and effect is the relationship between two things when one thing makes something else happen. For example, if we eat too much food and do not exercise, we gain weight. Eating food without exercising is the “cause;” weight gain is the “effect.” There may be multiple causes and multiple effects .We often use some words and expressions such as because, since, due to, as, thanks to, therefore, so to talk about cause and effect. I help you because I like you. I study hard because I want to pass the exam. We   have to go home since we have no idea where to go next.