"are types of" is correct and usable in written English.
You can use it when you are discussing different types of something, such as "fruit salads are types of salads".
Both are types of idealization.
But there are types of openness.
However, these are types of crimes, not motivation for crimes.
Suede and patent leather are types of finishes.
They are types of human beings in the raw.
Those are types of things that people like to share".
Masala dosa and pale green pesarattu are types of Indian crepes.
A friendly tone of voice or a pat on the neck are types of reward.
"These are types of behavior where people are hanging out on the street, and they do suggest some changes in women's behavior," Mr. Rosenfeld said.
The transplanted cells, which are types of stem cells, migrate to the site of damage and release factors that ameliorate or may even replace dead tissues.
"We believe there are as many types of asteroids as there are types of meteoroids, and there are dozens of types of meteoroids," Dr. Cheng said.
