What does Irrigation and irrigate means?

For english i have to find 4 errors in each diary post

Underline the ic or ic's and place the proper punctuation if needed. the board of trustees admits that it made a mistake because the employees were toolazy nothing happen to the board

In a group discussion, which statement most clearly uses evidence to support a conclusion? a) the author makes some good points, but i feel that he’s ultimately biased. b) the author proves that he’s biased when he uses terms like “silly” and “stupid”. c) the author obviously hates the way fast food tastes, which is why he’s negative. d) the author first criticizes fast food, and then goes in to criticize junk food.