Question

why is the sun important for living things​

Answer 1

Answer:

Importance of Sun-

The sun is the source of all energy, heat and light. The amount of sunlight in an area determines what living thing can survive there.

For example, the upper part of the sea or ocean receives a lot of sunlight. It is therefore warmer than the ocean floor, which has little or no light at all. Therefore, living things closer to the surface are very different from living things on the ocean floors.

Plants:

Different plants require different amounts of sunlight to survive. For example, ferns need less light, but dandelions need a lot of direct sunlight.

All plants use sunlight to make food (sugars) in a process called photosynthesis. They store the food in their leaves and the energy flows to other animals that eat the leaves. When leaves fall, decomposers in the soil, work on it, with the help of moisture and heat from the sun.

Animals:

Sunlight is vital for all animals, even though different animals need different amounts of sunlight and in different ways. For example: many mammals and reptiles such as snakes, turtles and lizards come out during the day to bask in the sun to raise their body temperatures and become active. At the same time, some animals like bats run to hide when the sun comes up to escape the heat. But they too, need the sun.

Answer 2

Answer:

Being the source of light, energy, and heat, the sun is very crucial for sustaining life on planet Earth. Besides being the regulator of day-night and seasons, it is also a significant source of energy.

Explanation:

• Plants can only photosynthesize in presence of sunlight. Sunlight helps plants in converting carbon dioxide and water into glucose.
• Animals depend on plants for food and thus indirectly depend on the sunlight for survival.  
• The sun's heat is keeping the earth warm and suitable for life. Without it, the earth would be cold and unable to support any form of life.
• Absence of winds, ocean currents, and clouds would make the climate stagnant. The sun regulates it all.
• In modern days, solar energy is harnessed for a lot of activities such as water heating, irrigation, cooking, electricity, etc.
• Solar energy is renewable and lessens our dependency on fossil fuels saving it from depletion.
• Water cycle is maintained by the sun.
• Sunlight also determines the types of organisms living in certain areas. Like in tundra regions only polar bears, penguins, etc. survive while the desert is exclusively for camels, jerboa, etc. This diversity is also seen in water bodies where creatures reside according to their favorable temperature zones.
• Some animals such as snakes, and reptiles are ectothermic (cold-blooded) and hence need sunlight in order to warm themselves up and start their day.