The correct option is "Neither 1 nor 2" because Eco-Sensitive Zones (ESZs) are not declared under the Wildlife (Protection) Act, 1972, but rather under the Environment Protection Act, 1986. Additionally, the purpose of ESZs is not to completely prohibit all human activities but to regulate and minimize them to protect biodiversity and promote sustainable development, hence allowing certain activities, including regulated tourism and traditional practices, under specified conditions. This nuanced understanding is key in the UPSC context, where comprehension of environmental legislation and its implications is crucial.