Which pronoun agrees with the antecedent in the sentence? everybody forgets umbrella sometimes. a. their b. her c. his d. his or her

"His or her" would technically be the best fit, since it is acknowledging both genders, but it is very common to use "their" any most people wouldn't consider it wrong. 

Claim for social media: social media is a growing issue in our society but, is it really an issue. social media can allow children and young adults to see different aspects of culture, communicate, and share experiences with peers.counterclaim: although social media can be distracting to children and young adults, limiting usuals in social media can ensure social media is an addition and not a control factor to your day to day life.