What is the original source of the energy that flows through most ecosystems? What would happen without this source?

The sun and its light is usually the original source of energy. Without it, most if not all of life on earth would be wiped out.

Explanation:

Taking the example of humans and our survival through eating meat such as cows, we can observe the sun's effect on the food chain. The sun provides the light energy needed for plants such as grass to do photosynthesis and make their own food source. Cows eat the grass. Humans eat cows. Without the sun none of this would be possible.

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.