A “blitz” is different from a “blitzkrieg” because only a “blitz”

targets civilians.
relies exclusively on air power.
takes place at great speed.
destroys large portions of the country.

B. relies exclusively on air power is the correct answer.

Explanation:

the enslaved people onboard suffered from illness with some frequency

on november 6 and 7, 1917 (or october 24 and 25 on the julian calendar, which is why the event is often referred to as the october revolution), leftist revolutionaries led by bolshevik party leader vladimir lenin launched a nearly bloodless coup d'état against the duma's provisional government.