First of all everyone should know this answer. But in case you don't know sometimes someone as in your classmate can be allergic to any sort of animal. Sometime it just depends on the kind of pet. If it was to be a dog then there are quite a few reasons. This question is fairly easy to answer.
<span>. c.Scientists studied the trapping of gases in the atmosphere.</span>
Answer:
I don't understand the question please be more specific
