Final answer:
The details from this passage that contribute most to the tone of the account are the descriptions of death and suffering.
Step-by-step explanation:
The details from this passage that contribute most to the tone of the account are the descriptions of death and suffering. The passage uses vivid and graphic language to depict the horrors of the concentration camp, such as the description of unconscious and dying people with frothing bubbles in their throats and foul liquid in their lungs. These details create a tone of extreme suffering, torture, and horror.