I'm not going to do 3-5 sentences but practicing speaking clearly is necessary for a group discussion to be successful because when you speak clear everyone can understand you and you if you don't like speaking in front of a class or anything it will stop you from having to say it again. I know this wasn't long but I hope it helps some!!
The scientists tracked several geeses flight paths.otherwise we can rewrite the sentence as "several geeses flight paths tracked by the scientists"
Singular noun is a noun that assigns to one thing, one person and one idea. Example: Boy, Girl, Father, Mother, Man, Doctor and so on.