You need to open the EPS file in Adobe Illustrator.
Sometimes stock vectors are all grouped or merged together, and they're difficult to isolate.
First thing to try:
Select everything (command + A) and go in the menu "Object" and select "ungroup." You might need to do this a few times.
If this doesn't work (or not well enough)
You can use the "selection tool" (black arrow) and double click on the element you want; it should isolate it or its group. You can do this a few times to select individual elements.
Then I suggest you try to copy-paste it in a new Illustrator file.
Sometimes it simply doesn't work
You might need to delete what you don't want and resave the file under a new name!
I strongly suggest you to do a "save as" under a new name BEFORE you start deleting anything; this way you won't overwrite these changes on the original file by accident.
If you can't even select anything or some parts seem to be impossible to select
- Verify the layers panel and see if there's layers that are locked. When the layer is locked.. there's a little lock you need to click to unlock...!
- Look in the menu "Object" and select "Unlock all."