Question

which are the inner planets

Answer 1

The inner four planets are called terrestrial planets. That means that they are like the earth in some ways. The terrestrial planets Mercury, Venus, Earth, Mars, and the earth's moon have similar compositions and densities. These planets are close to the sun, rocky, and dense.
The inner planets (in order of distance from the sun, closest to furthest) are Mercury, Venus, Earth andMars. After an asteroid belt comes the outer planets,Jupiter, Saturn, Uranus and Neptune.

Answer 2

The inner planets are those who lies in asteroid filed such as mercury,Venus,earth and mars are the inner planet of solar system