Carnivorous plants have enzymes that are able to break down the proteins of the insects and small animals that they ingest. The
mechanisms required for carnivorous plants have developed over many lineages across the world in separate ecosystems. The development of carnivorous mechanisms in plants is an example of:
Convergent evolution is the development of similar traits, across many lineages by plants and animals who originally do not have these traits but developed them because of the biome that they find themselves. Carnivorous plants are examples of living things that have undergone carnivorous evolution.
Plants lacking in Nitrogen have undergone carnivorous evolution for up to seven lineages. Sundews for instance have developed flypaper traps, a carnivorous property that helps them trap insects that they eventually digest.
B. Allows for specialized regions with specialized functions
Explanation:
Where the complete digestive system has different specialized regions to perform specialized functions, the gastrovascular cavity is the primary organ of digestion and circulation in two major animal phyla: the Cnidaria (including jellyfish and corals) and Platyhelminthes (flatworms).
It's not erosion, so that is out of the answer choices. And I doubt it is crystallization, so that is why I think it is A and D. (correct me if I am wrong.)