Both can transfer energy through matter, but sound waves travel through air and infrared waves travel through space.
The question ask on which of the following choices where the weaknesses apparent in American society in the late 1800's and the best answer among the choices is letter A.People became too materialistic, C. The economic system didn't work well and D. The government system adjusted to change too alowly.
The answer is Paranthropus boisei or P. Boisei. This specie was the earliest hominin and is also described as the largest of the Paranthropus family. This species of Paranthropus lived in Eastern Africa from 2.4 until 1.4 million years ago. Archaeologists found hominid bones along with early stone age technology, which was uncovered to be bones of Paranthropus Boisei.
Northern: No slaves, mostly republican (our democrat) ideas, economy was based on trade and business
Southern: Slavery was supported, mostly (our idea of) republican, their economy was based on plantations and slaves
Hope this helps! Please let me know if I'm wrong or missed something. :)
