Final answer:
The frontal lobe is responsible for higher-level cognitive functions such as planning, problem-solving, personality, and attention, making it the correct answer to the student's question.
Step-by-step explanation:
The brain is divided into several lobes, each responsible for different functions. The frontal lobe is particularly important for a variety of complex behaviors and functions. It is found in the forward part of the brain, extending back to a fissure known as the central sulcus. The frontal lobe is involved in reasoning, motor control, emotion, and language production, including areas such as the motor cortex, prefrontal cortex, and Broca's area.
The prefrontal cortex is responsible for higher-level cognitive functioning, including planning, problem-solving, personality, and attention. Damage to the frontal lobe can impact these functions, affecting personality, socialization, and risk assessment.
Given this information, the correct answer to the question about which lobe plays a key role in planning, problem-solving, personality, and attention is A. Frontal lobe.