Principal resource that determine the life on land is:

Question

Accepted Answer

Water is the principal resource that determines life on land because it is essential for the survival of all living organisms. It plays a critical role in various biological processes, including photosynthesis, nutrient transport, and temperature regulation. Water is a universal solvent, meaning it can dissolve a wide range of substances, which is crucial for the biochemical reactions that sustain life. Additionally, water is necessary for maintaining the structure and function of cells, tissues, and organs in plants and animals.

Now, let's examine why the other options are incorrect:

1. **Nature of soil**: While the nature of soil is important for plant growth, it is not the primary determinant of life on land. Soil provides nutrients and a medium for plants to anchor themselves, but without water, soil cannot support life. Water is needed to dissolve nutrients in the soil so that plants can absorb them.

3. **Temperature**: Temperature is a significant factor in determining the distribution of life on Earth, but it is not the principal resource. Organisms have adapted to survive in a wide range of temperatures, but they cannot survive without water. Water is essential for regulating body temperature and facilitating metabolic processes.

4. **pH of soil**: The pH of soil affects nutrient availability and microbial activity, which are important for plant health. However, like the nature of soil, pH alone cannot sustain life. Water is necessary to transport nutrients and maintain the chemical balance required for life.

In conclusion, while factors like soil nature, temperature, and soil pH are important for life on land, water is the fundamental resource that underpins all life processes. Without water, life as we know it would not be possible.