I recall my teacher saying it was A) ecology but im not too sure
I believe it would be the bending of the arm, utilizing your muscular ad skeletal system. As the joint in your elbow is cartilage part of the skeletal system, and the voluntary bending comes from the contraction of muscles in the arm.
I believe this adaptation of the blue poppies to their environment is due to directional selection. Directional selection refers to the mode of natural selection in which an extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time in the direction of the favored phenotype. In our case the plants with the thickest leaves were favored as they were more adaptable and in the end there was a shift to this characteristic by other plants.
The answer is D. Always true in all places
Number one is structural and 2 is behavior
Three is structural
Four is structural
The last one behavior