Which of the following is true about fossils? A.
Fossils found in lower layers of sedimentary rock are
as old as fossils found in upper layers of sedimentary rock.
B.
Fossils found in lower layers of sedimentary rock are
older than fossils found in upper layers of sedimentary rock.
C.
Fossils found in upper layers of sedimentary rock are
older than fossils found in lower layers of sedimentary rock.
D.
The relative age of fossils cannot be determined from their
position in sedimentary layers.

The answer is B!

Explanation:

if they are lower this means that they have been on the ground longer there for older

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.