Four words of the following sentence have been highlighted and given as options. Select the option that contains a spelling error.

Ongoing climate change, caused by the acumulation of greenhouse gases in the atmosphere, is happening on a timescale of decades to centuries and is driving environmental changes worldwide. 

Correct option is C

The correct spelling of the word in option (c) is "accumulation." Therefore, option (c) contains the spelling error.
· Meanings of the words given:
· Environmental (a): relating to the natural world and the impact of human activity on its condition.
· Atmosphere (b): the envelope of gases surrounding the earth or another planet.
· Accumulation (c): the process of gradually increasing or gathering together.
· Decades (d): periods of ten years.