the political, military, and social system in the Middle Ages, based on the holding of lands in fief or fee and on the resulting relations between lord and vassal.
Answer: Passive solar technology
Explanation:
Passive solar technology is the method of using materials to attract sunlight for warmth. Solar energy is the energy that comes from the sun. To store this energy gotten from the sun you'll need some elements to transfer this energy then store them. According to the passage the individual used a black material (black material is used for conveying and storing heat, it's one of the best form for doing so), the black material and the water helps warm the water needed for the individual after his hiking which actually worked.
Explanation:
It contributed massively to the UAE's sustenance and was the major profession for most of the population.
The correct answer is letter C.
Logrolling is an arrangement in which two or more members of Congress agree in advance to support each other's bills.
C) Igneous rock is formed when lava or magma cools
