a. The movement of our body build static electricity and nylon is the perfect media to hang on that charge .then there occure build up of electron on nylon surface and so removing nylon cloth electron are discharged and they cause cracking of nylon made dresses

b. Static electricity builds on the screen of the TV which gives the screen a +ve charge, It becomes a cathode. The now charged screen will now attract particles of dust consisting of anions . Over a period of time a layer of dust  form.

c. Most umbrellas have a metal rod which supports the covering. It protrudes through the covering at the top. One holds the other end. Walking around with one during a thunderstorm is the same as carrying a mini lightning rod, Lightning could be attracted by it. Thus, one may be easily hit by a thunderstorm.

d. While rubbing the balloon, more electrons (negative charges) are added to the surface of the balloon. The wall is now more positively charged than the balloon. As the two come in contact, the balloon will stick because of the rule that opposites attract (positive to negative).