False..... Agriculture is farming period, the production of food, animals, and breeding animals.
It was the planet Venus that made the spacecraft Magellan enable the scientists to make an extensive research. The spacecraft Magellan was a robotic space probe that was launched to observe the planet Venus and calculate the gravitational field of the planet.
b. THE EARTH GETS CLOSER AND FARTHER FROM THE SUN
The chronometer is a device to measure time in a period of time, therefore not a correct answer.
Look at the world clock on your phone