Please answer the following question by reasoning step-by-step.
If people have trouble finding enough resources to fulfill their calorie requirements, what might they have to do?\nOptions:\n- talk to each other\n- compete with each other\n- feed themselves\n- find water\n- feel lonely

compete with each other
Calorie supplies are usually limited.

People try to access it before others.

Striving to be first means competing with others.

.

Thus, the answer is compete with each other