Factores ambientales que causen estrés?

Explanation:

Spanish: Factores ambientales: los elementos en el entorno de un individuo pueden aumentar la ansiedad. El estrés de una relación personal, laboral, escolar o financiera puede contribuir en gran medida a los trastornos de ansiedad. Incluso los niveles bajos de oxígeno en áreas de gran altitud pueden aumentar los síntomas de ansiedad.

English: Environmental factors: Elements in the environment around an individual can increase anxiety. Stress from a personal relationship, job, school, or financial predicament can contribute greatly to anxiety disorders. Even low oxygen levels in high-altitude areas can add to anxiety symptoms.

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explanation:

the reason the two sea urchins don't compete with each other for food, resources, etc. is because the urchins have adapted to the environment but they have also adapted to each other. this is most likely because the genes of the sea urchins.