Questions

The Cold War started with building tensions between the US and the USSR during World War II. As Stalin began to annex more countries and spread communism throughout Eastern Europe, the US began to feel threatened and feared that they would start a war amongst the capitalist nations. The US started an attempt to limit the spread of communism and protect capitalism, which led to a series of passive aggressive and indirectly hostile exchanges between the two nations.

The beginning of the end of the cold war, the Berlin Wall came down. The USSR began to collapse the following year, in 1990.

Money spent by the government on government programs such as road work, electricity work, manhole, etc... that are aiming to contribute to the nation's social welfare in long and short term are referred to as Goverment Expenditures.

Here, the error is in part 4. As 'messages' is plural “speaks” will be replaced by “speak”. The rule applied is of subject verb agreement

A DNA is made up of four bases called Adenine, Thymine, Cytosine and Guanine.

Hina Jaiswal from Chandigarh has become the IAF’s first woman flight engineer.

Actually by swimming a person can easily burn more than 450 calories upto 920 calories per an hour. So, burn less than 400 calories per hour is not correct regarding swimming.