After a major fire, grasses that are pioneer species start to grow in the ashy soil. The following list includes some of the ways that the grasses affect the ecosystem.
absorbing nutrients from the soil
absorbing water from the soil
providing food for animals
preventing erosion
Which of the items on the list contribute to ecological succession in the burned area?

preventing erosion and providing food for animals

Explanation:

Ecological succession is a process that starts with hardy pioneer species and leads to a diverse ecosystem. After a fire, the ashy soil is vulnerable to erosion by wind and water. Grasses prevent erosion so that the nutrients in the soil are still available for other plant species. By providing a source of food, grasses attract animals to the area.

ecotourism pay for conservation efforts.

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.