The tundra ecosystem of alaska is known as a “cold desert.” it receives very little precipitation, about four inches annually. however, it is rich in wetlands due to permafrost, which traps moisture close to the surface. the temperatures vary widely, also producing persistent winds. although treeless, the arctic tundra is an abundant ecosystem. many organisms find their niche here including many migratory bird species and mammals such as caribou, foxes, bears, and small rodents. which element of the tundra ecosystem is biotic?
a. wind
b. dead bird
c. carbon dioxide
d. temperature

its B. dead bird

since biotic is something that is alive or has once been and abiotic is something that has never been alive

The correct answer is option B. dead bird

In an ecosystem two types of components exist which are known known as biotic and abiotic.

A biotic component is the one which has life or had life at some point of time. A dead bird is therefore considered as biotic component because even though at present it doesn't have life yet earlier it had life. Abiotic components are those components which neither have life at present nor they had in past. Wind, carbon dioxide and temperature are therefore considered as abiotic components of tundra ecosystem.

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.