John Muir encouraged the establishment of various parks in the United States' National Park System, including the Yosemite and Sequoia National Parks.

Answer: C) Mongolia Explanation: China shares land borders with 14 different countries, the longest being with Mongolia followed by Russia and then India.

Answer: D) 280 Explanation: Here asked for the value of 28 tens => 28 x 10 = 280.

A Badminton shuttle or a tennis ball.

Answer: A) Oxytocin Explanation: Oxytocin is a mamallian hormone and also acts as neuro transmitter in the brain.

Answer: C) polar bonds / polar molecule Explanation:

Answer: B) increases product supply Explanation:

Answer: C) Wind Explanation: The energy sources that are constantly being replenished, such as sunlight, wind, and water. This means that we can use them as much as we want, and we do not have to worry about them running out. Additionally, renewable energy sources are usually much more environmentally friendly than fossil fuels. Overall, they release very few chemicals, like carbon dioxide, that can harm the environment. Most of this energy comes from fossil fuels, such as coal, oil, and natural gas. These are nonrenewable energy sources, which means that if we use them all up, we can never get more during our lifetime. Fossil fuels also contribute greatly to global climate change by releasing carbon dioxide into the air when they are burned.