Answer:
Green plants are called producers because they manufacture their own food with the aid of photosynthesis.
Your answer is (B.)
Fossils in newer layers if rock are generally estimated to be younger than fossils found in the deeper layers because it is closest to the surface. The soil and earth didn't have enough time to "bury" the remains of the dead animal ( Bury is used for a simpler term) underground. The farther down a fossil is the more likely it is older unless the animal tends to burrow. Seeing as the question is probably talking of older animals that is unlikely for an animal to burrow that far. So your answer is B.
B - Advancements in science can lead to advancements in technology, and technological advancements can also lead to scientific advancements.
How your teeth are shaped and formed
If you can use any letters, it would have to be 2 lower case letters such as tt
