Which of the following scenarios is not considered hazardous for pregnant women?

The scenario in which the ground in the work area is flat, not slippery, and has no unfixed lines is not considered hazardous for pregnant women. A stable and safe working environment minimizes the risks associated with slips, trips, and falls, which can be particularly concerning during pregnancy due to physical changes and balance. When the ground is level and free from obstacles, it significantly reduces the likelihood of accidents, contributing to a safer work atmosphere for expectant mothers.

In contrast, the other scenarios presented could present various risks. Frequent exposure to chemicals can lead to harmful effects on both the mother and the developing fetus. Working in high-stress environments may also pose risks, as stress has been linked to complications in pregnancy. Heavy lifting can increase the risk of strains, injuries, and other complications during pregnancy, making those activities potentially hazardous for pregnant women.