Explanation

"Cities" receives the action of the verb "polluting," so it is the direct object.

The structure is: Subject (Automobiles) + Verb (are polluting) + Object (cities).

Explanation

If a sum becomes 3 times in x years, and you're using compound interest, then:

• In 2x years, it becomes $3\times 3=9$ time

• In 3x years, it becomes $3\times 3\times 3=27$ time

So, if the sum triples in 4 years, it becomes 27 times in $4\times 3=12$ years.

Explanation

According to the Economist Intelligence Unit's Democracy Index, Norway is considered the world's first democracy. 

The Economist Intelligence Unit has published a Democracy Index since 2006, and consistently ranks Norway at the top.

Explanation

Silicon is a metalloid with properties ideal for controlling electrical current.

It's the most widely used material in semiconductor devices like transistors and chips.

Explanation

The sentence is a hypothetical conditional (second conditional), which uses "were" for situations contrary to reality.

"If it were more humid in the deserts, the hot temperature would be unbearable" is grammatically correct in this context.

Explanation

In space, beyond Earth's atmosphere, the sky actually looks black because there is no air to scatter sunlight.

The blue color we see from Earth is due to Rayleigh scattering in the atmosphere, not the actual color of the sky.

Explanation

Looking at the pattern:

20 → 20 (no change)

20 → 19 (decrease by 1)

19 → 16 (decrease by 3)

16 → 17 (increase by 1)

17 → 13 (decrease by 4)

13 → 14 (increase by 1)

14 → 11 (decrease by 3)

Now, we continue the alternating pattern:

11 → 12 (increase by 1)

12 → 9 (decrease by 3)

The next two numbers are 10, 10.

Explanation

 Australia's national tree is the Golden Wattle ( Acacia pycnantha). 

Australia Capital is Canberra.

Australia Currency is Australian Dollar.

Australia official language is English.

Australia national game is Cricket.

Australia located is in Continent Oceania.

Australia Primary Religion is Christianity (But Secular Country).

Australia Head of Govt. is Prime Minister  - Anthony Albanese.

Australia Parliament called Federal Parliament.

Australia flas has three colours.

Explanation

Let's compare the fractions:

• 1/2​=0.5

• 4/5​=0.8

• 5/8​=0.625

Clearly,

4/5​>5​/8>1/2​

Correct answer: (B) 4/5

Explanation

During photosynthesis, plants use water (H2O) along with carbon dioxide (CO2) to produce glucose and oxygen.

The oxygen released comes specifically from the water molecule.

Being split apart to provide the oxygen atoms needed for the glucose molecule.