Jawaban:

1. Hydro culture or hydroponics is the method of growing plants without the use of soil, where the plant roots are instead suspended in an inert medium such as water or gravel.

2. Hydro culture or hydroponics is used to grow plants in a controlled environment in which the grower can manipulate the nutrient availability, pH and temperature of the water to optimize plant growth, resulting in better yields and healthier plants.

3. The advantages of planting by using hydro culture or hydroponics include:

- The ability to grow plants in areas where traditional soil-based growing methods are not possible, such as in urban areas with limited space or in areas with poor soil quality.

- Increased plant growth and yields due to the ability to precisely control the nutrient availability and pH of the water in which the plants are grown.

- Reduced water usage compared to traditional soil-based growing methods.

- The ability to grow plants year-round, regardless of seasonal changes.

- Reduced risk of pests and disease due to the absence of soil.

4. Yes, hydro culture or hydroponics needs water as it uses water as the medium to deliver nutrients to the plant roots.

5. The picture is not provided for me to identify the planting structures.