The dog's reflection on the water's surface is because of light rays reflecting off the dog and onto the water to create a mirror image.
The correct answer is mRNA.
mRNA or messenger RNA is synthesized during the process of transcription, from DNA molecule which is used as a template. mRNA contains information about protein synthesis (translation) in the form of nucleotide triplets or codons.
In the example above: reference book is DNA molecule (template for copies), copies are mRNA, wood is amino acids (building blocks) and doghouse is protein.
What it does is lowering the germination rate by more than a half(That's all, I'm sorry I couldn't provide more :(
Permian-Triassic extinction