4. what type of evidence do you think would be most difficult to collect

I think it is trace evidence since it is really small and hard to find.

The type of evidence that is more difficult to collect is evidence known as trace, for example, fibers, hair, or signs of dirt.

Explanation:

For the collection of this type of evidence, specialized equipment such as special vacuum cleaners, tweezers, etc. are used, all with the purpose of carrying out the collection of trace evidence. This type of evidence is characterized by being very difficult to find.

h let me think

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.