Answer:
Option D.The author's attitude toward a subject.
Explanation:

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Answer: Humans were hunters and gatherers, they were always trying to find new food and plants. This is why they moved from one place to another
I hope this helped!
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The central idea of the text is to inform about the problems and solutions for solar energy production faced by Elon Musk.
<h3>“How Tesla’s Batteries Can Change the Solar Power Game”</h3>
The main idea of the text is to talk about "The dream of a solar-powered society has tormented us for decades." however, there are several problems to be faced "Grid operators need a way to store the sun's energy to smooth out the supply during the night and when it's cloudy."
But great minds are working to solve these problems. "Even though the panels and storage are spread across many rooftops, they are effectively roped together into a single 10-megawatt power plant that APS can control.
With this information, we can conclude that the text aims to inform the advances in technologies for obtaining clean energy.
Learn more about Solar power in brainly.com/question/1420731
Palpable means that something can be felt or touched. In the short story "the dank tropical night that was palpable as it pressed its thick warm blackness in upon the yacht". The answer is D.