In “when i have fears that i may cease to be,” what is keats symbolizing in the image of “high-piled books” that “hold like rich garners the full ripened grain”?
a.
his completed poems
c.
his untapped ideas
b.
places he wants to visit
d.
volumes he wants to read

Keats is referring to a. his completed poems.

In "When I Have Fears That I May Cease to Be", Keats talks about his fear of death--but more than that, he describes his fear of not being able to achieve everything he wants to before he's gone. He describes it in the passage:

When I have fears that I may cease to be

Before my pen has gleaned my teeming brain,

Before high-pilèd books, in charactery,

Hold like rich garners the full ripened grain;

The high-piled nooks represent his complete work, the poems he has written, while the "Hold like rich garners the full ripened grain" make reference to the full potential and recognition he would like them to reach.

the correct answer would be d, i never like waking up.

explanation:

iambic tetrameter is a meter which is basically a line consisting of four feet of iambic and it is used in poetry. it consists of unstressed syllables followed by a stressed syllable. in this question, the only statement which is giving the feel of being stressed is option d, which says that i never like waking up. it means the person is feeling stressed whenever he wakes up. he never likes to wake up and and whenever he wakes up, he doesn't like it. so a sense or feel of being stressed is in this statement.  

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.