The sadness in the poem that the poet speaks about is violence because of unthoughtfulness of the people.

Explanation:

The poet expresses a deep sense of sadness in the poem, highlighting the cause of this sadness as violence resulting from the unthoughtfulness of people. Let's delve into the reasons why option A is the correct answer:

1. The poet's portrayal of violence: Throughout the poem, the poet emphasizes the destructive nature of violence and its impact on individuals and society as a whole. The use of powerful imagery and descriptive language conveys the sense of sadness that arises from witnessing such violence.

2. Unthoughtfulness as the root cause: The poet suggests that the root cause of this violence is the lack of thoughtfulness or consideration among people. This implies that individuals are not mindful of the consequences of their actions and engage in violent behavior without considering the harm they cause to others.

3. Consequences of unthoughtfulness: The poem portrays the consequences of unthoughtfulness, which include suffering, pain, and destruction. The poet laments the loss of innocent lives and the devastation caused by violence. This further reinforces the idea that the sadness in the poem stems from the unthoughtfulness of people leading to violence.

4. Critique of society: The poet's focus on unthoughtfulness as the cause of violence suggests a critique of society. By highlighting this issue, the poet urges individuals to reflect on their actions and consider the impact they have on others. The sadness expressed in the poem can be seen as an emotional response to the prevailing violence in society, which is fueled by unthoughtfulness.

In conclusion, the sadness in the poem is primarily caused by violence resulting from the unthoughtfulness of people. The poet seeks to convey the devastating consequences of this violence and calls for greater thoughtfulness and empathy in society.