A gardener starts a compost pile. He adds dead leaves, lawn clippings, and other organic matter to the pile. After a few weeks, the gardener notices that materials in the pile have turned brown and soft. The compost pile also feels warm both during the day and at night. Which of the following statements is the best explanation for this?
A. Wind is causing the materials in the pile to rub together, and this generates heat from friction.
B. Wild animals are using the compost pile as a nest, and their body heat is warming the pile.
C. Soil from the ground has moved up through the compost pile, which makes the pile denser and warmer.
D. Decomposers are breaking down materials in the compost pile, which causes heat energy to be released.

Awoman whose sister tested positive for a specific mutation in the brca1 gene, which increases the risk for breast and ovarian cancer, is found not to have that mutation but does have a mutation of unknown significance near the known mutation site. how should this woman be counseled? select one: a. she should be informed that her risk for breast cancer is greater than the general population but not as great as her sister’s risk. b. she should be informed that because she does not have the mutation, her risk for breast cancer is not greater than that of the general population. c. she should be informed of her gene mutation status and be presented with all the available prophylaxis options and reconstruction options. d. she should be informed that she does not have the specific mutation but that because another mutation is present she should be vigilant about screening