Questions: Fossil fuels were formed - 300 years ago - 20 years ago - before dinosaurs - in the Middle ages - I don't know

The answer is the third one: before dinosaurs.

Explanation for each option:

• 300 years ago: This is incorrect. Fossil fuels were not formed as recently as 300 years ago. They take millions of years to form from the remains of ancient plants and animals.

• 20 years ago: This is incorrect. Fossil fuels are not formed in such a short time frame. They require millions of years to develop.

• Before dinosaurs: This is correct. Fossil fuels were formed from the remains of ancient organisms that lived millions of years ago, long before the time of the dinosaurs.

• In the Middle Ages: This is incorrect. The Middle Ages occurred from the 5th to the late 15th century, which is far too recent for the formation of fossil fuels.

• ☐ I don't know: This option is for those who are unsure of the answer, but the correct answer is known and provided above.

In summary, fossil fuels were formed millions of years ago, well before the time of the dinosaurs.