It is estimated that about 13 pounds of material from Mars lands on the Earth each year. That happens when meteorites hit Mars and knock material up into the sky. A very small proportion escapes from Mars's gravity and goes into orbit round the Sun. A very small proportion reaches the Earth. A very small proportion of that reaches the ground.
Since no one from Earth has visited another planet, and we have no indication that there is anyone on the other planets, Earth does not help other planets in any way. Why do you think there is something Earth does to help them- whoever them is.
No, not numerically, not massively, not in distance. Not in any way I can think of.
You will not pass any planets on the way from Venus to Earth because both planets are right next to each other, except if you count Venus and Earth as passing from one to the other.
No planets are similar but there is a moon. Titan, one of Jupiter's moons, is very similar to Earth.
earth
Mercury Mars and Venus. Yes and these along with Earth are called the terrestrial planets.
Life probably does not exist on any of the known planets (except earth). But if life does exist on one of those planets, it would probably be on Mars. Venus is way too hot, Mercury does not have an atmosphere, and the other four planets are made up almost entirely of gas.
Mars and Earth are planets in a galaxy called the Milky Way, inside the universe.
The Earth's magnetic field does not affect living organisms directly but can influence their behavior due to its role in bird migration and navigation in some animal species. Inanimate objects like plastics or metals are also not affected by the Earth's magnetic field in a significant way.
All of them in one way or another. This includes Earth.
The milky way is a GALAXY where the earth and the other 10/11 planets are in.
They don't, really, except for the actions we take. Eclipses do not directly affect life on the Earth in any way.