Explain what might occur if an infection began wiping out native grasses and plant in an ecosystem

The animals that feed on those grasses and plants would adapt and find other food sources or start dying off.

The speed of  sound:   sound travels  at different speeds depending on what it istraveling through. of the three mediums (gas, liquid, and solid)  sound waves travel the slowest through  gases, faster  through  liquids, and fastest  through  solids.

It is evolution, because we all have some of the same traits like eye color or shape or ears.