Answer:
Oil
Explanation:
Since, unlike oil, source like wind, solar, water etc. come naturally we don't and can't replace them but when the viscosity in oil has been used up it must be change to allow the proper functioning of the machine.
Ganymede & Callisto are low-density moons with a mixture of ice and rock. They are farther from Jupiter and are geologically dead.
The four largest moons of Jupiter, Io, Europa, Ganymede, and Callisto, are known as the Galilean moons or Galilean satellites. Galileo Galilei initially observed them in December 1609 or January 1610, and in March 1610, he identified them as Jupiter satellites. They were the first discovered extraterrestrial objects orbiting a planet other than the Earth.
To know more about Jupiter refer:
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The best way of doing it without potentially causing harm to yourself, would be "wafting".
Answer:
A
Explanation:
zygote is the merged gametes of different organisms
<span>a.
identifying several solutions to a problem
b.
questioning source information
c.
implementing the first solution to a problem identified
d.
verifying source information</span>
