Based on the nature of auxins explain how auxins could cause hydrotrpism

A class of plant hormones called auxins coordinates this root growth process. Auxins play a key role in bending the plant's root towards the water because they cause one side of the root to grow faster than the other and thus the bending of the root.

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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