Based on the following passage, what force can you infer is responsible for causing an implosion if not pressure?
implosion is the process of strategically placing explosives at various key points along a building’s main supports. when the explosives are detonated, the key supports fail, the building becomes unstable. the term implosion here is a misnomer; technically an implosion is a difference between the external pressure of a building and its internal pressure that is so great the building collapses on itself.

1. gravity
2. friction
3. air resistance
4. centripetal force

the correct answer would be b, when, queen, calder hall and london.

explanation:

we always capitalize words when a paragraph or sentence is starting, when an important name is used, when a place is being written, or simply when a noun is used, etc. so in this sentence, sentence is starting from 'when', so it will be written in capital letters. secondly, queen is considered to be an important person, so it will also be written in capital letter. next, the name of the town is mentioned, i-e calder hall, which will also be written in capital letters. in the last,   city name is being used, 'london', which will also be written in capital letters. so option b is the most appropriate one.

answer; dogs;