answer:Amazing Grace, How Great Thou Art, Holy, Holy, Holy, Blessed Assurance, It is Well With My Soul, A Mighty Fortress is Our God, and Great is Thy Faithfulness are popular Protestant hymns.

answer:Advantages: 1. Opportunity to serve one's country and make a difference 2. Intense training and physical conditioning 3. Good salary and benefits 4. Skill development and career advancement opportunities Disadvantages: 1. Risk of injury or death in combat situations 2. High stress and demanding work environments 3. Long periods of separation from family and loved ones 4. Psychological trauma and PTSD can be common among combat veterans.

answer:Some important waterways in the Netherlands include the Rhine River, the Meuse River, the Scheldt River, the IJssel River, and the Amsterdam-Rhine Canal.

answer:OLED stands for Organic Light Emitting Diode. It is a display technology that uses thin layers of organic material to generate light. Each pixel in an OLED screen emits its own light, allowing for ultra-deep blacks and high contrast ratios. When a voltage is applied to the organic material, it emits light. OLED displays do not require a backlight, resulting in thinner and lighter displays with lower power consumption.