In "when i have fears . . ," how does the speaker describe the books he hopes to write? a. he compares them to grain harvests. c. he says they are shadowy. b. he compares them to night's starred face. d. he says they are filled with unreflecting love.

a. He compares them to grain harvests. 

Let me write here some lines of the poem "When I Have Fears". 

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. 
Do I need to explain further? 
The last two lines say it so. 

In the other lines of the poem, the ones he pointed out as shadowy are chances, the night's starred-face is compared to romance, and the things filled with unreflecting love are his fears. 

The lines 
"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."

explains that in "When I Have Fears . . . ,"  the speaker described the books he hopes to write that and a. he compares them to grain harvests.