AnswerExplanation:
NOUN 
competitions (plural noun) 
the activity or condition of competing. 
"there is fierce competition between banks" · "at this conservatory, competition for admissions is stiff" 
synonyms: 
rivalry · competitiveness · vying · contesting · opposition · contention · conflict · feuding · battling · fighting · struggling · strife · war · keeping up with the Joneses 
an event or contest in which people compete. 
"a beauty competition" 
synonyms: 
contest · tournament · match · game · round · heat · fixture · event · meet · encounter · race · bout · fight · prize fight · quiz · trials · stakes · clash 
the person or people with whom one is competing, especially in a commercial or sporting arena; the opposition. 
"I walked around to check out the competition" 
synonyms: 
opposition · opposing side · other side · other team · field · enemy · foe · challengers · opponents · rivals · opposers · adversaries · fellow contenders · fellow competitors · corrivals 
ecology 
interaction between organisms, populations, or species, in which birth, growth and death depend on gaining a share of a limited environmental resource. 
"competition with ungulates or condylarths appears to have been the undoing of marsupials in North America"