Final answer:
The subject of this question is English and the grade level is High School. The four types of conventions mentioned are instructional notes, punctuation marks, abbreviations, and symbols. Among the punctuation marks, the examples include period, comma, semicolon, and colon.
Step-by-step explanation:
In English, the four types of conventions mentioned are instructional notes, punctuation marks, abbreviations, and symbols. Among these, the conventions related to punctuation marks include period, comma, semicolon, and colon.