menstruation takes 3-5 days of menstrual cycle but ovum relesed only at 14th day. if pregnancy happens menstruation stops how it detects before ovulation(fertillization).

Well, when you start your period it means that your egg didn't get fertilzed and that is  why when you get pregnant your period will stop.

Explanation:

black

lasagna

lunch

math

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above