The river that is often referred to as the "lifeline of European trade" is (B) Rhine. The Rhine River is a major waterway in Europe that flows through several countries, including Germany, France, the Netherlands, Switzerland, Austria, and Liechtenstein. It plays a crucial role in the transportation of goods and is an important trade route, earning it the designation as the "lifeline of European trade."

Answer: A) Dragon flies Explanation: Dragon flies have legs but they cannot walk.

Answer: A) TRUE Explanation: Air or gas can build up in the pleural space and when this happens, it's called a pneumothorax. Hence the given statement is TRUE.

Answer: A) a pair of scissors Explanation: Any of the basic mechanical devices for applying a force are called simple machines. There are 6 basic simple machines; the lever, the wheel and axle, the inclined plane, the wedge, the pulley, and the screw. Several of these simple machines are related to each other. But, each has a specific purpose in the world of doing work.

The Inter-Services Intelligence (ISI) is the premier intelligence agency of Pakistan, responsible for providing critical national security and intelligence assessments to the government. It was established in 1948 and operates under the jurisdiction of the Pakistan Ministry of Defence. The ISI is primarily focused on safeguarding Pakistan's interests, both domestically and internationally, and plays a crucial role in counterintelligence, counterterrorism, and strategic intelligence.

Porcupine is one of the animals protected under the Wildlife (Protection) Act, 1972. The Act categorizes species into different schedules, and porcupines are likely to be listed in one of these schedules, affording them legal protection against hunting, poaching, or other forms of exploitation. The protection is aimed at conserving biodiversity and ensuring the well-being of various wildlife species.

It's important to note that the specific categorization of animals can be subject to amendments, so it's advisable to refer to the latest version of the Wildlife (Protection) Act or consult relevant authorities for the most up-to-date information.