() which best describes how johannes kepler developed his laws of planetary motion?
a.) he calculated the gravitational force on orbiting bodies.
b.) he debated with copernicus who proposed the heliocentric model.
c.) he examined the motions of planets through a telescope.
d.) he analyzed data collected by tycho brahe.

The right option is; D.) He analyzed data collected by Tycho Brahe.

Johannes Kepler was a German astronomer who developed his laws of planetary motion by analyzing the astronomical observations that Tycho Brahe had collected over many years. The three scientific laws of Kepler describe the movement of planets around the Sun. The first law of Kepler states that the orbits of the planets are ellipses, with the sun at one of the two foci.

you are the source of the heat energy. you can minimize the heat energy by selecting the appropriate clothes to wear.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.