We are flying from San Francisco to Australia. Looking back the last thing we observe of San Francisco is the Golden Gate Bridge. Choose the answer that best explains why the bridge was the last bit of San Francisco that we observed.

Question

Since the Earth is a sphere the last thing that was observed was the tallest: the bridge.

because of the water vapor in the air everything disappeared in the haze. The bridge was what we saw last.

50 miles out is as far as is possible to see through air.

Answer 1

The best explanation for why the Golden Gate Bridge was the last bit of San Francisco observed is: because of the water vapor in the air everything disappeared in the haze. The bridge was what we saw last.

This option highlights the impact of atmospheric conditions, such as haze or fog, which are common in the San Francisco area and can obscure visibility. The Golden Gate Bridge, being a prominent and recognizable structure, may be the last landmark visible before everything else fades from view due to these conditions.