The cingulate cortex is a subcortical structure above the corpus callosum. its anterior (forward) segment participates in and its posterior (rear) segment participates in

Answer;

Decision making and emotion; memory and visual processing

Explanation;

Cingulate Cortex  is a subcortical structure above the corpus callosum. its anterior (Forward) segment participates in decision making and emotion, and its posterior (rear) segment participates in memory and visual processing.

-The forward 2/3 of this structure, the ACC: anterior cingulate cortex- participates along with the hypothalamus in the control of the autonomic nervous system (also roles in decision making, emotion, anticipation of reward, and empathy)

The rear third, PCC: Posterior cingulate cortex participates in memory and visual processing.

for a different answer set the answer would be because the oxygen in the water had depleted (apex)