Excessive loud noice.
Environmental stressors include weather, noise, crowdedness, and light exposure. So, your answer would be excessive loud noice.
Being around excessive noise
The environmental stressor is the stimulus that is present in the surrounding of a human being. The stimulus is capable of developing stress in the mind and body of a person. The stimulus can be biotic or abiotic in nature. The examples of environmental stressors include external excess noise or noise pollution, insects, extreme temperature, animals, reptile, and natural disasters.
Having an illness
its bassicly asking u to answer it in your own words does that