The biotic elements of an eco system include all of the following except?

The answer to this would be D: physical components of the environment, such as rocks and sand. The word "biotic" mean all the living organisms within an ecosystem such as plants and animals.

The most relevant answer is the option D. Which is physical components of earth/environment.

Biological community alludes to as the collection of plants, animal and microbial species living respectively in one place communicating to one another and their physical and compound condition

There are two components of an ecosystem.

we would need to see the picture to answer it

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]