The correct answer is overtaking.
The grass land has large number of plantation and this is very prone to natural fires. wild fires prevents the overtaking of plant species one on another. They help to maintain the native species of the grassland by burning out the intruders.
The correct answer is germinating
There are many plant species that require huge amount of heat for the germination of the seeds, forest fire helps in germination by proving heat.
Example: Ceanothus is a plant found in grassland that are coated with flammable coverings that requires heat to germinate.
