In your own words, explain each sentence. 1. If people stopped trying to reach new goals, the movement forward would stop.

In simple words, what this means is that if everyone was stuck, the world would be too.

Explanation:

Advancement is produced by people, if people did not have goals in life they would be stagnant.

That means that the world would not advance, we would always be in the same place because we would all be satisfied with what we have, without aspiring to more.

With the goals of each of the people on the planet, day by day we advance more and we will continue to do so while everyone aspires to more.

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.