Question

to prepare for the slippery slide down, riders put on a soft helmet and some arm pads. then they lie on a mat. the mat has a pocket for their feet and a strap to hold as they slide. workers cant secure, or attach, the mat to the rider, so riders must hold that strap tightly all the way down. what does \secure\ mean in this passage? to feel safe to fasten firmly to slide down to hold lightly

Explanation:

The word "secure" in the context of the passage is related to ensuring something is firmly attached or fastened. The sentence "Workers can't secure, or attach, the mat to the rider" implies that "secure" means to fasten firmly. The other options ("to feel safe" is about emotion, "to slide down" is an action, "to hold lightly" is the opposite of firm holding) don't fit the context as well as "to fasten firmly".

Answer:

to fasten firmly