Question

insert two 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:

To insert two dashes (an em dash, which is often represented by two consecutive en dashes or a single em dash) for parenthetical information, we identify the non - essential clause. The clause "the legendary storm chaser killed by a deadly tornado in 2013" provides additional information about Tim Samaras. So we place dashes around this clause.

Step 1: Identify the parenthetical part

The part "the legendary storm chaser killed by a deadly tornado in 2013" is the non - essential information about Tim Samaras.

Step 2: Insert the dashes

We insert the dashes (using two of the given en dashes) around this clause. So the sentence becomes: "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."

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.