What is an ecological fallacy? How do you avoid it?

What will be an ideal response?

(i) An ecological fallacy, also known as aggregation bias, is a fallacy that is committed when individual level conclusions are drawn from aggregate level data. The existence of a relationship at the aggregate level does not mean that there is also a relationship at the individual level. (ii) Use the unit of analysis of your data to determine how you phrase the pattern you see.