The Earth has four major systems or spheres. These systems are  1. The geosphere,  2. The hydrosphere,  3. The atmosphere, and  4. The biosphere.   The biosphere is the system where we belong.

Answer: B) Augustus Explanation:   Augustus was a Roman statesman and military leader who served as the first Emperor of the Roman Empire, controlling Imperial Rome from 27 BC until his death in AD 14. Jesus was born in 4 BC.   Hence, Augustus was the Roman Emperor when Jesus was born.

Answer: C) 128 bits Explanation: IPv6 - Internet Protocol Version 6. IPv6 addresses have a size of 128 bits. Internet Protocol Version 6 [IPv6] is the successor to the Internet's first addressing infrastructure, Internet Protocol version 4 (IPv4). In contrast to IPv4, which defined an IP address as a 32-bit value, IPv6 address have a size of 128 bits.

Answer: A) Only statement A is required Explanation: From statement (A), 20b = (1/2) × b × h h = 40 cm.

Answer: B) 1 Explanation: Logic is 1st fig : 9x2 + 5 = 23 2nd fig : 6x3 + 4 = 22 3rd fig : Nx4 + 5 = 9 => N = 1.

Answer: C) The Civil Rights movement Explanation: The Civil Rights Movement :   The Civil Rights Movement in the United States was a struggle by black Americans to gain full citizenship rights and achieve racial equality. Individuals and organizations challenged discrimination with a variety of activities, including protest marches, boycotts, and refusal to abide by segregation laws. Many believe that the movement began with the bus boycott in Montgomery, Alabama, in 1955 and ended with the Voting Rights Act of 1965.

Answer: B) Darkness Explanation: The More You Have the Darkness, The Less You See i.e, visible less.

Answer: D) Bacteria Explanation: The process by which bacteria convert nitrogen gas (N2) into ammonia (NH3) is called Nitrogen Fixation.   The conversion of nitrogen from one form to another in the nitrogen cycle is carried out primarily by Nitrogen Fixing Bacteria such as Azotobacter.