Answer:
I would say that firefighters and police officers are called heroes because they would do anything to help or save a person's life. They sacrifice their lifes for other people. Sadly, while they do some of these sacrifizes, they may end up hurting themselves or there life's ending.
I would go with the first the 3. Placing the telescope on the tripod. was chosen by the astronomy club
Hmmmmmm im not saying this is right but I honestly think its the Last one because none of them make sense in the sentence so yeah i think its the last one but im not sure
