The footprint of a dinosaur and the burrow of an ancient shrimp are examples of which kind of fossils a. body b. amber c. trace d. index

The answer would be:

C. Trace

Here's more about the

Trace fossils are geological records of the behaviors and activities of life in the past. They are indirect evidences or impressions usually preserved in rocks. Examples of trace fossils would be footprints and burrows like those given in the question including root cavities and feeding marks.

d bonding propertys

explanation:

carbon can form so many different compounds not just with oxygen

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.