Which of the following is an example of how a scientist might use a model?
a.)a stopwatch is used to time the rate of a chemical reaction
b.)a microscope is used to magnify a group of cells on a slide
c.)the end of a slinky is moved vertically up and down to stimulate a wave
d)a wrench is used to tighten a nut onto a piece of wood

the heightened emotion and nature images.

they lost control of territory in the middle east, but preserved turkey's political independence.

the answer is a. the harappan civilisation is also called the indus valley civilisation, this is because they built their cities along the indus river. the reason behind this location can be found in the rest of the "old world" civilisations like mesopotamia or egypt, the first built their cities along the rivers tigris and euphrates, the second along the nil; : their respective civilisations thrived because the overflowing of their respective rivers produced favorable conditions for agriculture, their main support.