Which is biotic ?
a: wind
b: iron gate
c: sunlight
d: dead leaf

Out of all of them, the dead leaf sounds like it'd be biotic.

Explanation:

The wind, the gate and sunlight are all abiotic examples.

Dead leaf

The other things are arn't alive nor at one piont alive. The leaf on the other hand came from a tree, I living breathing thing. But the Sun, Wind, and Iron gate are not alive and were never alive nor will thaey ever be alive.

So the anser is Dead leaf

I hope this helps!

a axis of a graph is a color or shade so we can all go outside and have a party so we can eat   some grilled cheese sammiches and broccoli and have some ugly fun times

i don't know why i put this, i know its not the i was just bored : p

delete this answer while you can

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation: