"and that could have serious implications for the rate at which the seas rise."
what type of sentence is this? is it a compound sentence because of the use of the subcoordinating conjunction "and" at the beginning of the sentence?

my guy how are we supposed to know

most likely you should find things like facts and important information to you understand. i hope this .

21 balloons is the story of professor william sherman's travels.

in 1883, he set off from san francisco for a balloon ride over the pacific and was found a month later floating with 21 balloons in the atlantic ocean. this seemed an astounding feat and everyone wanted to know what had happened.    

professor sherman was loyal, however, and said he would tell his tale first to the western american explorers club in san francisco, of which he was a member. this built up suspense for several chapters before he began to tell of the wonders of his adventures and the amazing island of krakatoa, an island which had just been blown up by a volcano.  

the residents of krakatoa are all millionaires who live under a "gourmet government" of their own devising. we get to see all the incredible adventures that creative people with unlimited resources would create according to the author.

noun phrase/ noun phrase/ verb phrase/ noun clause/ awnsers are in order to questions above