There are many different types of scientific investigations, including controlled experiments, observational field studies, the collection of specimens, and model-building. Which type of investigation is best used to study global weather patterns?

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."

b. climate change will cause an increase in biodiversity of all ecosystems.

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1) a

2)c

3)a

4)c

5)b

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the correct answer is d