All organisms contain special structures that store important information and perform many task to help the organisms survive. The picture below shows what some of these structures look like under a microscope.

what are the structures?
A. Cells
B. Air particles
C. Worms
D. Water particles

c (diamond),

sio2 (quartz)

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.