Which is the most difficult to fossilize?
a) fish
b) mammals
c) plants
d) snails

I think its plants because they don't have a skeleton like the rest of us have.

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.