Jonah spent 40 days in Nineveh and Jesus spent 40 days in the desert. They both sacrifice themselves. Jonah being stuck in a whale for three days foreshadows Jesus' descent to hell.
A. Earths atmosphere contains 78 percent oxygen, which is essential for life.
The workers are specialized if they perform only smaller tasks and if they become better and better at these tasks - "specialists". This means that the whole process is divided into smaller takss that the workers can specialize in.
Therefore the correct answer is
D. dividing labor into smaller specific tasks
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