Answer:b. developments such as the three-field system and the padded horse collar meant that agriculture actually improved from classical time.
Explanation:Early Middle Ages or Early Medieval Period , sometimes referred to as the Dark Ages , as lasting from the 5th or 6th
century to the 10th century.
In the 19th century the Early Middle Ages were often labelled the "Dark Ages" , a characterization based on the relative scarcity of literary and cultural output from this time.
The early middle Ages generally believed to have started with the fall of the Roman Empire in 476 and to have lasted about 1,000 years until about 1450. The beginning of the Middle Ages is called the Dark Ages because the great civilizations of Rome and Greece had been conquered.
Congress ratified preliminary articles of peace ending the Revolutionary War with Great Britain on April 15, 1783. On September 3, 1783, the Treaty of Paris was signed, bringing the Revolutionary War to its final conclusion.
Answer:
B. All of these are drivers
Explanation:
The populations of lot of amphibians, with rare exceptions, are constantly on the decline around the world. The main reason behind this is the human activity, as it has caused lot of changes, pollution, and dangers for the amphibian populations, which has led lot of amphibians to be on the verge of extinction.
The pollution, especially of the waters, has been a major factor for the decline of the amphibian population. Lot of very toxic chemicals have made the water unsuitable for living and poisonous, which systematically killed off the amphibian populations.
The habitat loss, as with any other group of animals, has left the amphibians without places to live. They have been left without their shelters, food sources, mating grounds, and they have started to die out.
The invasive species, especially the predatory ones, have also had big negative impact. The amphibians didn't had any defense mechanism against the introduced predators, so they were easy prey and their numbers rapidly went down.
Answer:
C
Explanation:
think of it as a car, when you wash it the water runs off the surface, it'll do the same when its not absorbed
