Bonjour !!
1- When there is more food than needed, all the excess food is wasted and being dumped.
2- A lot of students are hungry while studying so they can't really concentrate on their work.
3- With this mouvement the author wants us to realize that there is a lot of food that is being wasted while some people are starving.
4- He encourages the people to go and take a look inside the dumpster of the grocery stores and take photos/videos of all the waste and post it on social media with the hashtag #DonateNutDump.
5- The solution might be that instead of wasting and dumping all the excess food, grocery stores should donate this food to all the people in need.