They rely on glucose (sugar) as It's energy source....
Answer: B. Water breaks down into oxygen molecules for respiration.
Water is the required for photosynthesis, a process by which plants (terrestrial and aquatic) makes their food by utilizing water as a reactant to produce oxygen and glucose as product. The glucose act as a source of energy for conducting various metabolic processes in plants but oxygen is released in the air.

This oxygen is necessary for terrestrial and aquatic animals for respiration. Therefore, water breaks down into oxygen by the process of photosynthesis, hence water plays important role in respiration in living beings.
Answer: The correct answer is Gene.
Gene is a segment of DNA ( deoxyribonucleic acid) that codes for a protein. The protein thus formed corresponds to a specific trait of the organism.
The gene first undergoes transcription to synthesize mRNA ( messenger RNA), which is finally translated to form protein.
Thus, the term associated with transcription and that describe regions of nucleic acid is gene.
Answer:
Nearsightedness, Farsightedness and Astigmatism. Nearsightedness (myopia) is a very common condition in which the light coming into the eye is not focused properly onto the retina, making it difficult to see objects far away. The condition is usually caused by an elongation of the eyeball that occurs over time.
Explanation: