It is not that people inĀ  brainly are lazy its just that it is not only the definition that is given but there are also explanation that will help the inquirer to understand it better
no i see some of questions are looking for definitions only they didn't ask for an explanation i think maybe they're just lazy to compile all the definitions, so they'll expect here other people to do so
although they are not asking for explanation still they get some explaination