If plants in the rainforest and desert were able to share what they each have in abundance, rainforests would be less lush and deserts greener. Plants in the rainforest compete to reach the sun with broad leaves and tall stems, while desert plants evolved to store water. Most rainforests receive more than 100 inches of rain annually, while deserts barely collect 10 inches of precipitation a year in a good year, with periods of droughts frequently occurring. These drastic differences caused the plants within these two biomes to develop and adapt to their distinctive living conditions in different ways to help them thrive.
A: to give workers a voice in their dealings with business owners
B - Petroleum
Wood was one of the first energy sources, way before the nineteenth century so you can rule that choice out.
Nuclear Energy is more advanced and closer to the twentieth century so you can also rule that out.
And coal was before petroleum, around mid to late eighteenth century possibly.
Hope this helps!
