Letters and postcards are examples of this kind of correspondence.
What is mail? (Or, what is the mail?)
In basketball and soccer, this is a method of controlling the ball while moving.
What is dribbling?
Some people are born without the ability to make enough insulin, leading to the type I of this disease.
What is diabetes?
This gas is the first element on the periodic table of elements. It's also a key component of water.
What is hydrogen?
Savory and addictive, this is one of the last foods many are willing to give up before going vegan.
What is cheese?
Some less-than-trusting types keep this under the mattress instead of in the bank.
What is money?
While doing the butterfly, you're sure to get a great full-body workout with this sport.
What is swimming?
This surprise killer has infected over 86 million people worldwide and killed nearly two million in just one year.
What is COVID-19?
It's the hot, molten rock that flows from a volcano.
What is lava?
It's a healthy, staple breakfast food in the United States, often served warm and with milk and sugar.
What is oatmeal?
Suitcases and trunks are examples of this necessity of travel.
What is luggage?
Whether with a strike or a spare, the goal of this sport is to knock down all the pins.
What is bowling?
This is a group of diseases that spread over parts of the body as abnormal cells.
What is cancer?
A synthetic material made of polymers, this is used to help create anything from children's toys to nail polish.
What is plastic?
Sprinkle some of this on a latte, or add it to an Indian curry. It's a spice that adapts well to different cuisines.
What is cinnamon?
Sofas and chairs and ottomans, oh my!
What is furniture?
Originating in India, a casual version of this sport is played on beaches and at picnincs.
What is badminton?
Once a guaranteed death sentence, this progression of HIV is now treatable with advancements in medicine.
What is AIDS?
The term for this natural phenomenon derives from the Latin for "weight." In outerspace, there is little of it.
What is gravity?
The common protein base to stews and burgers, this is also used to describe disagreements between people.
What is beef?
When a burglar strikes, this trove of valuables may be exactly what he is after.
What is jewelry?
Debated as an actual sport, this challenging activity is perhaps better-suited to the more intellectual student.
What is chess?
This lung condition cannot be cured, but it can be controlled with medications delivered through an inhaler.
What is asthma?
This molecular structure codes genetic information.
What is DNA?
This popular food, with its origins in Mexico, was once served as a bitter drink rather than a tasty treat.