Activated carbon is widely recognized for its ability to remove pollutants and remediate contaminants, as it effectively adsorbs various contaminants from water and air, including heavy metals. This is due to its large surface area and porous structure, which enhance its adsorption capacity. Additionally, activated carbon can be synthesized from environmental wastes, such as agricultural and lignocellulosic wastes, making it a sustainable option. Therefore, Statements II and III both support and explain Statement I, making option 1 the correct choice.