403. A second reason why workout is becoming more and more popular is due to people's increasing awareness of the importance and need to take better care of themselves and their health.
健身變得越來越流行的第二個原因是人們日漸意識到保持身體健康的重要性和必要性。

六級詞匯講解:
此句可用于表達分論點的主題句中o reason后面接why引導的定語從句來表達觀點。be due to用于解釋原因；increasing表示“增長的，增加的”，也可用rising或growing來代替。

考點歸納:
because of、due to、owing to、on account of和thanks to都是介詞短語，用于解釋原因，官們的用法比較如下：

because of意為“由于，因為”，強調因果關系，在句中僅作狀語，修飾句中的一部分，與其他成分不用逗號隔開。如：
We must not get discouraged because of such a minor setback.
我們決不可因為這樣一個小小的挫折而灰心喪氣。

owing to也強調因果關系，除作狀語外，也可作表語。作狀語時修飾整個句子，可在句首或句末，與前面的內容之間用逗號隔開。如：
They decided to cancel the flight，owing to the storm.
由于這場暴風雨，他們決定取消這個航班。
His death was owing to an accident.
他死于一場事故。

due to引出造成后果的原因，可在句中作表語、狀語和定語。作表語和狀語時與owing to同義；作狀語時，一般不與其他成分隔開。如：
This accident was due to (owing to) his careless driving.
這次車禍是由于他開車疏忽大意造成的。
He arrived late due to（owing to）the storm．
由于暴風雨，他來晚了。
Mistakes due to carelessness may have serious consequences.
由于疏忽大意造成的錯誤可能帶來嚴重的后果。

on account of與because of和owing to同義，但語氣較為正式。可作狀語、表語，不作定語。如：
He could not come on account of his illness.
他因病不能前來。
That was on account of lack of exercise.
邢是由于缺乏鍛煉。

thanks to表示“幸虧，多虧”，含有感謝之意，在句中作狀語和表語。如：
Thanks to your advice，much trouble was saved.
多虧你的建議，避免了許多麻煩。

句型拓展:
A second reason why public transportation should be emphasized over roads and highways is that studies have shown that having more people use public transportation over driving cars greatly cuts down on the pollution of the air.
其次，公交系統之所以比公路和高速路更重要，是因為研究顯示，如果使用公交系統的人數多于開車的人數，空氣污染程度就會大幅降低。
Another reason for choosing the jewelry is that it's a fashion accessory, as such, can add sparkle and beauty to whatever I am wearing.
我選擇珠寶的另一個原因是，珠寶屬于時尚裝飾品，因此無論我穿什么衣服，它都能將我裝扮得美麗奪目。