Petroleum products. So oil and natural gas etc.
Jewelry and precious stones come in second.
They have to wait for the right weather to dig a grave. If it looks asthough it is about to rain then they will know that all of the soil will fall inside the grave.
Answer:
Warm climates
Explanation:
To have spectacular fall colors, one has to live in warm climates because in that climate, trees lose their leaves and become dormant during the winter. When leaves of different colours fall, it leaves the environment colurful.
Cheers.
