Problem: The Renaissance era was from 1400 to 1600. It was characterized by greater use of instrumentation, multiple interweaving melodic lines, and the use of the first bass instruments. Social dancing became more widespread, so musical forms appropriate to accompanying dance began to standardize.
When was the Renaissance era?
The answer is the following: from 1400 to 1600

Problem: What drove circadian rhythms to evolve has been an enigmatic question. Previous hypotheses emphasized that photosensitive proteins and circadian rhythms may have originated together in the earliest cells, with the purpose of protecting replicating DNA from high levels of damaging ultraviolet radiation during the daytime. As a result, replication was relegated to the dark. However, evidence for this is lacking, since the simplest organisms with a circadian rhythm, the cyanobacteria, do the opposite of this - they divide more in the daytime. Recent studies instead highlight the importance of co-evolution of redox proteins with circadian oscillators in all three kingdoms of life following the Great Oxidation Event approximately 2.3 billion years ago. The current view is that circadian changes in environmental oxygen levels and the production of reactive oxygen species (ROS) in the presence of daylight are likely to have driven a need to evolve circadian rhythms to preempt, and therefore counteract, damaging redox reactions on a daily basis.
What is theorized to have evolved with circadian rhythms?
The answer is the following: photosensitive proteins

Problem: The languages have not undergone the deliberate highlighting of minor linguistic differences in the name of nationalism as has occurred in the Bosnian, Serbian and Croatian standards of Serbo-Croatian. However, most Slavic languages (including Czech) have been distanced in this way from Russian influences because of widespread public resentment against the former Soviet Union (which occupied Czechoslovakia in 1968). Czech and Slovak form a dialect continuum, with great similarity between neighboring Czech and Slovak dialects. (See "Dialects" below.)
Why have many Slavic languages sought to separate themselves from Russian influence?
The answer is the following: widespread public resentment against the former Soviet Union

Problem: Eisenhower responded to the French defeat with the formation of the SEATO (Southeast Asia Treaty Organization) Alliance with the U.K., France, New Zealand and Australia in defense of Vietnam against communism. At that time the French and Chinese reconvened Geneva peace talks; Eisenhower agreed the U.S. would participate only as an observer. After France and the Communists agreed to a partition of Vietnam, Eisenhower rejected the agreement, offering military and economic aid to southern Vietnam. Ambrose argues that Eisenhower, by not participating in the Geneva agreement, had kept the U.S out of Vietnam; nevertheless, with the formation of SEATO, he had in the end put the U.S. back into the conflict.
What is SEATO?
The answer is the following:
Southeast Asia Treaty Organization