Wildfires have both negative and positive effect on an ecosystem. which is a negative effect of wildfire on any ecosystem.

A negative impact of fires on ecosystems is soil erosion.

Explanation:

Forest fires cause soil degradation, this depends on the topography of the site, its intensity, the recovery rate of plant material, etc. This leads to a change in the physicochemical and biological properties of the soil, affecting its productivity. The impact of fires produces erosion, loss of nutrients, and changes in vegetation (Mataix-Solera and Cerdà, 2009).

After a fire the soil is susceptible to erosion, since it is very exposed to wind and water, leading to environmental problems such as problems with water infiltration, increased water surface flow, among others.

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.