Explain how human activity has threatened the sustainability or helped maintain the sustainability of this aquatic or terrestrial ecosystem.

the answer is most likely c. it shows us that the rules that the pigs make can change on a whim whenever it suits the pigs purpose.

hope this

a. "to practice" is the best phrase to complete the sentence.

explanation:

during the summer, she likes to practice her soccer skills so that she is ready to play in the fall.

(note that : all the other options "the practicing of", "practice for" and "to do a practice on" are inappropriate as they make the sentence grammatically incorrect.)

you   can   protest   and   boicot   and   have   marches  

the answer is sail boat won the race , and it was going 8 feet per   second