Which of the following types of poisoning can sometimes be counteracted by moving the person into fresh air?

Moving a person into fresh air is particularly effective for inhaled poisoning. This type of poisoning occurs when toxic substances are breathed in, affecting the respiratory system and, subsequently, the entire body. By relocating the affected individual to an area with clean, fresh air, the concentration of the harmful substance can be significantly reduced, allowing for better oxygenation and less exposure to the toxin.

Inhaled poisons often include gases, vapors, or fumes that can rapidly impact a person's health, making immediate removal from the source essential for mitigating harm. This step can provide relief from symptoms such as difficulty breathing, dizziness, or confusion.

In contrast, the other types of poisoning listed—ingested, contact, and injected—do not benefit from simply moving to fresh air. Ingested poisoning involves toxins consumed through food or drink, contact poisoning relates to harmful substances contacting the skin, and injected poisoning involves toxins introduced directly into the body through a needle or bite. Each of these requires different first aid measures that go beyond merely moving the person to a different environment.