B is for ... bug!

Many people say that all insects, spiders and other creepy crawlies are bugs. But there are a group of insects that are 'true bugs' - like aphids, cicadas and stink bugs.

Question: There are so many insects alive today that scientists can only guess how many types there are. Some estimate that there could be up to:

a. 10,000 species
b. 1,000,000 species
c. 10,000,000 species