I would say that it would be C, Relationships of trees to other organisms in the rain forest...
I believe It is A because fissure eruptions are common on large volcanoes and also is built up by many layers of hardened lava, tephra, pumice, and volcanic ash.
The answer would be D being those are all learned or earned attributes.
Genetic code - everyone uses same 4 bases. gene expression depends on many other factors