The orbit of the planets in our solar system is generally due to which characteristic of the sun

In physics, an orbit is the gravitationally curved path of an object about a point in space, for example the orbit of a planet about a star. or a natural satellite around a planet. Orbits of planets are typically elliptical, and the central mass being orbited is at a focal point of the ellipse.

That is true tge cactus as a structural adaptation to its envirinment has it leaves reduced to spines. but this doesnt mean it cant produce food it produces food because of the presence of chlorophyll in its stem

Atissue is a group of connected cells that have a similar function within an organism.