Explanation

Polyester is made from Polyethylene Terephthalate (PET), a synthetic polymer.

It is widely used in fabrics, plastic bottles, and packaging materials.

Explanation

A comma is correctly placed to separate two independent clauses in a compound sentence.

The comma helps to clarify that these are two related but separate ideas.

Explanation

A conjunction connects two clauses or ideas; here, "because" links the reason for running fast.

It shows cause and effect between "He ran fast" and "he was late."

Explanation

Aristotle emphasized holistic education, believing that both physical and mental well-being are essential for learning.

His philosophy supported balanced development, combining intellectual, moral, and physical training for a well-rounded individual.

Explanation

Enthalpy is a form of energy, so its SI unit is Joule (J).

1 calorie = 4.184 joules.

But Joule is the standard unit in thermodynamics.

Explanation

Diego Maradona scored the "Goal of the Century" against England in the 1986 FIFA World Cup quarter-finals.

He dribbled past five England players from his own half before scoring, making it one of the greatest goals in football history.

Explanation

Oil wrestling (Yağlı Güreş) is Turkey's national sport, with a history dating back to the Ottoman era.

The Kırkpınar tournament, held annually since 1360.

It is one of the world's oldest sports competitions.

Explanation

Air does not directly maintain the nitrogen cycle; rather, nitrogen-fixing bacteria play a key role in converting atmospheric nitrogen into usable forms for plants.

Air acts as a propagating medium for sound, supports the water cycle, and helps in the pollination of seeds by carrying pollen grains.

Explanation

A Test match is the longest format in cricket.

It is usually played over five days.

Each team gets two innings, allowing time for strategy, endurance, and full play.

Explanation

In the crouch start (used in sprinting), one knee rests on the ground behind the starting line.

The other leg is bent forward, ready to push off at the start signal.