Your memory for the moment you heard about the planes crashing into New York's Twin Towers would be most appropriately termed a(n) memory.

Flash bulb memory

Explanation:

The theory of Flashbulb memory was first proposed by Brown & Kulik (1977). They defined flashbulb memory as a highly detailed, exceptionally vivid "snapshot or photographs" of the moment when a surprising and emotionally arousing event happened.

Flash bulb

Explanation:

Flashbulb memories are one type of autobiographical memory. They are known for their elements of personal importance, consequentiality, emotion, and surprise.

Flashbulb memories have six characteristic features: place, ongoing activity, informant, own effect, other effect, and aftermath. Arguably, the principal determinants of a flashbulb memory are a high level of surprise, a high level of consequentiality, and perhaps emotional arousal.The planes crashing into New Yor'k Twin Towers is a flashbulb memory that has the element of surprise.

d.

thist title points out that you are explaining the nature of the u.s. government. it is the most specific. a representative government consists of a government where decisions are taken according to a voting system. the most essential aspect of a representative government is found in the different structures where voting rights are granted to different groups of people. for example, voting for governor, mayor, president, local police chief etc.