While developing writing skill among the students at primary level, a teacher must encourage her students to write on topics related to

The correct option is "personal life".

To understand why this is the most appropriate choice, let us break down the developmental needs of primary school students when they are learning to write:

1. Contextual Relevance and Familiarity:
At the primary level (typically ages 5 to 11), children's cognitive development is in the concrete operational stage. They understand and relate best to concrete concepts that are part of their immediate, everyday experiences. Topics related to their personal life—such as their family, pets, favorite toys, hobbies, or daily experiences—are highly familiar to them. This familiarity ensures they do not face a cognitive barrier trying to understand the subject matter itself while simultaneously learning the mechanics of writing.

2. Expression of Ideas and Vocabulary:
Children have already developed the spoken vocabulary to describe their own lives. When encouraged to write about personal experiences, they can easily retrieve words and construct sentences because they are translating direct personal memories and emotions into written language. In contrast, complex abstract topics like religious beliefs, social issues, or national themes require abstract thinking, specialized vocabulary, and a mature socio-political awareness that primary students do not yet possess.

3. Motivation and Engagement:
Writing is a creative and communicative process. Beginners are highly motivated when they write about themselves because it gives them a sense of ownership and voice. Sharing their own stories makes the writing process enjoyable, engaging, and meaningful, which is crucial for building a lifelong positive attitude toward writing and communication.

Therefore, encouraging primary school students to write about topics related to their personal life is the most effective pedagogical approach to build their foundational writing skills.