The logical progression of facts or information is called complexity
transition
sequence
Answer it right please.

postards have pictures on them, these pictures are things that may never be seen again. the pictures are a part of our history that shows things. because of this many collectors would pay a lot of money for them.

i read on google they "offer a glimpse into the past"

hope this : )

the answer is: round.

in literature, round characters are considerably complex and experience or are subjected to unpleasant situations. as a consequence, they go through crucial sentimental and psychological development, which can cause surprise in the readers. in this case, juan's dramatic transformation is related to the adversities he meets at school.

martians or other types of aliens represent a unique fear as opposed to zombies. vampires and other types of monsters.   in most sci-fi stories, aliens come from other worlds and have different or more advanced technology.   abductions and experimentation on human bodies that involve these technologies, or the use of these technologies against human beings and the use of unknown "powers", are a type of fear that's different from that of other types of monsters.  

your answer is c) experiments with water vapor showed that elements combine in specific proportions.