D. rift valleys.
Trenches occur at convergent oceanic plates; fossils are extremely old bones, bodies, or footprints, which have gotten so old the intervening years have turned them into rock; U-shaped valleys are valleys which are shaped like the letter U, and are usually formed by glaciers, which tend not to occur underwater very often.
<span>Scientists choose where are units of time began and ended based on major changes in life forms at certain times</span>
Answer:
These 9 technological innovations shape the sustainability agenda
Public electric transport.
Electric trucks.
Cheap energy storage.
Long-term storage.
Plastic recycling.
LED light efficiency.
Accessible solar power.
Carbon capture and storage.
Explanation:
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