So bees going extinct is a really big problem since they pollinate so many of the crops that we eat. There are a number of theories as to why this is happening. Also keep in mind that all of the theories might be correct in that multiple factors are leading to the decline of bees. One of the major theories is that they are dying do to a pesticide that’s used to keep bugs from eating our crops. Though not everyone agrees with this theory and some people think that it doesn’t play a big part. Another theory is diseases caused by viruses and fungi are killing the bees. Just like humans, bees can get all sorts of contagious diseases which can spread and kill a large number of bees. In addition, the way that bees are bred has changed over time so that bees may not be as healthy as they used to be.

They're not. Honeybees are suffering from some diseases, but there is no reason to think that they will actually become extinct because of them. Beekeepers may no longer keep bees because it costs too much money with so many of their bees dying, but they are still keeping some of their bees alive.

I also don't believe that any of the wild species of bee are in any trouble from these diseases.