The author refers to there tragedies that occurred in the history of the opera house. What are they?

The entire construction period of the Sydney Opera House was beset with problems. First, the podium was found to be not strong enough to support the shells and needed extensive reworking as early as 1963. Then the problem of the shells, which were elliptical, parabolic and finally spherical, took six years to resolveExplanation:

The word “tragedy” comes from the Greek words tragos, which means goat and oide, which means song. A tragedy is a dramatic poem or play in formal language and in most cases has a tragic or unhappy ending.

the support that the author, uses in the article facing our fears is a): a definition of the part of the brain called the amygdala.

he takes neuroscientist joseph ledoux's words by telling that by falling to distinguish between evolutionary old systems located in the amygdala and newer systems, centered in the prefrontal cortex, doctors have conflated non conscious threat circuits in the brain with circuits that underlie the conscious experience of fear. that, the author says, "leads ledoux to the jarring conclusion that the amygdala, a decades-old centerpiece of the brain's fear circuit, does not underlie the conscious feeling of fear".

despite this, the author points out in the article that that is a controversial notion and that evidence, in animal and humans, supports the idea that core emotions can exist outside of conscious awareness.