Answer:
the mucous membrane lining the uterus, which thickens during the menstrual cycle in preparation for possible implantation of an embryo.
Explanation:
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A. remove contaminants from people and equipment
decontamination: the process of cleaning an object or organism from contaminants and/or hazardous stuff/chemicals
A . Plumbing is the correct answer. Biology is a science, English is a language, Physical education is a more or less a co-curriculum subject. Plumbing is an artisan, its more involving and needs training to perfect in such an art.
