Correct Answer: D

Rationale: Maslow's hierarchy of needs is a theory in psychology that categorizes human needs into five levels. These levels, from the most fundamental to the highest, are physiological needs, safety needs, love and belongingness, esteem needs, and self-actualization. Therefore, all the clusters listed in the choices - love and belonging, physiological needs, and self-actualization - correspond to different levels within Maslow's hierarchy of needs. Choosing 'All of the above' (option D) is the correct answer as it includes all the clusters associated with Maslow's theory.

Correct Answer: D

Rationale: Maslow's hierarchy of needs is a theory in psychology that categorizes human needs into five levels. These levels, from the most fundamental to the highest, are physiological needs, safety needs, love and belongingness, esteem needs, and self-actualization. Therefore, all the clusters listed in the choices - love and belonging, physiological needs, and self-actualization - correspond to different levels within Maslow's hierarchy of needs. Choosing 'All of the above' (option D) is the correct answer as it includes all the clusters associated with Maslow's theory.

Correct Answer: A

Rationale: The correct answer is the lens. The lens is a transparent structure in the eye that helps to focus light onto the retina, which is essential for clear vision. The cornea and sclera are also important parts of the eye, but the lens specifically plays a crucial role in focusing light onto the retina.

Correct Answer: C

Rationale: The correct answer is the stomach. The stomach is a muscular organ located slightly to the left in the abdominal cavity. It serves as a temporary storage site for food where it is mixed with digestive enzymes and acids to begin the process of digestion.

Correct Answer: B

Rationale: The primary purpose of handwashing is to prevent the transfer of microorganisms. Proper hand hygiene helps reduce the risk of spreading harmful bacteria and viruses, thus promoting overall health and preventing infections.