Topic: Group verb,

Best Answer Explained in Below-:

The phrase 'Never look down upon the poor' embodies a moral and ethical principle that emphasizes respect, dignity, and empathy for all individuals, regardless of their socio-economic status. The expression 'look down upon' means to regard someone as inferior or to treat them with disdain, which is precisely what the sentence cautions against.

In social contexts, this phrase serves as a reminder to foster compassion and understanding rather than judgment. The poor often face significant challenges and systemic barriers that can affect their lives, and looking down upon them perpetuates stigma and inequality.

While the other options, such as 'look at,' 'look after,' and 'look down,' can have implications regarding attention or care, they lack the specific connotation of disdain embedded in 'look down upon.' Thus, the phrase succinctly captures a stance of humility and respect, urging individuals to view the poor as equals rather than subjects of contempt, making option D the most appropriate choice in the given context.