Legally, what is it considered if pesticide application equipment is left accessible to children?

If pesticide application equipment is left accessible to children, it is legally considered negligence. This is because negligence refers to a failure to take reasonable care to prevent harm, which in this case involves failing to secure potentially dangerous equipment that poses a significant risk to a child's safety.

In situations like these, the law expects individuals, especially those handling hazardous materials, to take necessary precautions to ensure that such items are kept out of reach of children. The expectation of reasonable care is a key component of negligence, highlighting the responsibility to recognize and mitigate risks associated with harmful substances.

The other options may imply a lacking in responsibility or care but do not carry the same legal weight as negligence. Carelessness and irresponsibility acknowledge a lack of attention but do not necessarily fulfill the legal criteria for negligence. Endangerment might imply more severe consequences or intent to harm, which is not a precise fit for the scenario of simply leaving equipment accessible.