Involuntary muscle contraction, such as those in the pupil of the eye, digestive tract, and diaphragm are the responsibility of the

a cerebrum
b medulla oblongata
c cerebellum
d spinal cord

Cerebrum controls the higher brain function such as speech, writing, etc. The cerebellum controls the involuntary stuff such as your digestive track, breathing, etc.  The other 2 control a branch of other stuff. C is your answer.

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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