Question

insert dashes where needed. tim samaras the legendary storm chaser killed by a deadly tornado in 2013 was known for his daring missions to collect data from passing storms.

Explanation:

Dashes are used to set off non - essential or parenthetical information. In this sentence, "the legendary storm chaser killed by a deadly tornado in 2013" is additional information about "Tim Samaras".

Answer:

Tim Samaras—the legendary storm chaser killed by a deadly tornado in 2013—was known for his daring missions to collect data from passing storms.