An occluded front forms when a warm air mass is caught between two cooler air masses.
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<span> They </span>do<span> not </span>respond to stimuli<span>, they </span>do<span> not grow, they </span>do<span> not </span>do<span> any of the things we normally associate with life.
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Atoms with the same number of protons, but different numbers of neutrons are isotopes of the same element.
I think that the answer is (D)... I hope this helped