Yes the drop down menu to complete the sentence prehistory is the time before
This makes no sense to me.
people left written records
1. Click on the drop-down menu.
2. Look for the option that says "Prehistory".
3. Select the option "Prehistory".
4. The sentence will now be completed, and it will say "Prehistory is the time before..."
5. Continue writing or completing the sentence with the relevant information or context you want to include after the word "before".