Humans, plants and mushrooms are all alive. what do these organisms have in common?

Humans, plants and mushrooms have in common that they are all composed of cells, which are the basis of life.

Cells are the smallest element within the complex structure of living beings and are the basis of their levels of organization.

Common characteristics among humans, plants and mushrooms:

Therefore, we can conclude that humans, plants and mushrooms have in common that their biological composition is based on cells and they perform the three vital functions (nutrition, respiration and reproduction).

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All living things such as Humans, plants and mushrooms respire, reproduce, locomote, grow, die and decompose.

Explanation:

Since Humans, plants and mushrooms are all living things (biotic) they have following common characteristics -

a) They all are made up of cells which divide by the process of either mitosis or meiosis to grow and reproduce.

b) They all show locomotion in some way.

c) They all have certain vital tissues that are nothing but the specified cells that helps performs specific function.

d) They all die and are decomposed by microbes.

e) They all respire and need nutrition for their survival.

it would be c. xylem.