What is Spaghetti ....

Spaghetti is a long, thin, cylindrical pasta of Italian origin. Spaghetti is made of semolina or flour and water. Italian dried spaghetti is made from durum wheat semolina, but outside of Italy it may be made with other kinds of flour.
It is a  variety| type  of pasta.
Spaghetti is a long, thin, cylindrical pasta of Italian origin. In other words long, thin strands of dried or fresh pasta that is the most popular form of pasta in Italy.
Spaghetti is cooked in a large pot of salted, boiling water,  which is brought to boiling.
Then  salt is  added and after a minute or so
the pasta is added. After 10 to 15 minutes
(the timing is most often written on the packet as per the brand and thicknesses) the spaghetti is drained of water with a colander. Spaghetti  takes more time to cook depending on it's thickness.
TIP 4 BOILING PASTAS....
"Al dente"  means  vegetables are cooked to the "tender crisp" phase, still offering resistance to the bite, but cooked through. Keeping the pasta firm  for further  baking also called  "al forno" pasta dishes, which will be baked.
The term "al dente" comes from Italian and means "to the tooth" or "to the bite", referring to the need to chew the pasta due to its  firmness.
Like its cousin "macaroni," spaghetti is made from semolina and water. Sometimes eggs are added. The name comes from the Italian word for "strings." Everybody’s favorite, Spaghetti pairs well with just about any kind of sauce. 
Try spaghetti with a simple tomato sauce, with or without meat or vegetables.
Arrabbiata sauce is made of  fresh tomatoes, garlic, and parsley with a tantalizing touch of crushed green chili peppers. Another sauce that will blend well with spaghetti is the
Marinara sauce is made from  fresh tomatoes, onions, and a unique combination of spices like the  basil, oregano and garlic.
The Tomato & Basil  Sauce has the fresh flavor of sweet basil and cooked along with chunks of  tomatoes, olive oil, carrots and onions with a  combination of  delicate herbs.
The Napoletana is a robust sauce, roasted garlic, sweet onions, tomatoes, olive oil, and a mix  of oregano, parsley, and black pepper to get a tasty  sauce.