Answer #10
will give brainliest to first response.

We don't know what species are needed for survival.

basically he is stating that biodiversity is important because animals depend on other animals as a food source. so when their diet dies off, they will also die or adapt to their environment to prey on a diff food source.

answer; i believe the answer is hydraulic action;

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.