Explain what tides are include high tide and low tide in your answer

the  alternate rising and falling of the sea, usually twice in each lunar day at a particular place, due to the attraction of the moon and sun.

"the changing patterns of the tides" Witch makes the high tide, and low tide

Explanation:

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.