Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to understand the four main parts of the brain [title] Explore the largest section of the brain. [step] The brain weighs approximately 3 pounds, and the cerebrum occupies 80% of this mass. Important brain functions such as thought, memory, judgement, and decision-making are all controlled in the cerebrum.

Ending1: [title] Understand the function at which a brain is connected, or connected to nearby neurons. [step] The cerebellum is located next to the brain. Ending2: Which one is responsible for the brain functions? For example, a brain is a motor, leading you to generate a dense processor from the brain. It uses all these connections to create bigger, more efficient solutions in a given situation in a larger context. Ending3: Frontal lobe development is a distinct area with many complex concepts and has a significant impact on how those together use the brain. [substeps] The primary primary function is the central brain. Ending4: [title] Understand the sections of the cerebrum. [step] The cerebrum is divided into four lobes, each with a specific function : [substeps] Frontal lobe: high levels of perception and motor skills are controlled by the frontal lobe.

Answer format: ending1/ending2/ending3/ending4