Which of these would MOST LIKELY lead to a change in the ecosystem of a certain area?

"as the band marched across the crowd field cheered"

It's a gift from god that allows people to bear witness to horror.

  i think you forgot to put the options but if your reffering to this question then your answer will be "b"  a. add "to" to the base form to create an adjective.b. when the subject of a sentence is singular, add "–s" to the base form.c. add "–ed" to irregular base forms to form the past participle.d. do not use a base form with plural subjects