Answer:
Boolean: Stores one of two given values
Autonumber: Serves as a counter in your database
Null: Allows optional values
Memo: Allows inserting a large amount of text including numbers
Explanation:
These are all data types used in computer language
Boolean: Boolean is used for creating either true or false statements. This makes it store one of two given values.
Autonumber: Autonumber in compuer language is a data type that is used to create an automatic numeric counter. This makes it serve as a counter in a database.
Null: Null is a data type that signifies nothingness. It is not designed as a particular data type, but it signifies that a data value does no exist in the database. This allows for optional values.
Memo: Memo is a datatype that can contain large amounts of text including numbers
