That which is an example of a complex sentence is: As industrial robots became more common, many laborers who lacked skills lost their jobs.
A complex sentence is a sentence with one dependent clause and one independent clause.
In the sentence above, we find an example of a dependent and independent clause being used to form a complex sentence.
The first half of the sentence separated by the comma is the dependent clause while the second half is the independent clause.
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"Planting trees throughout Sahel" is the one action among the following actions given in the question that would be the most effective long-term solution to fighting desertification in the Sahel.
"Typhoon winds led to the failed Mongol invasions of _____ "
D. Japan
Is there an all of the above? I guess if I had to answer, i would say A. Grest battles