What right did the english nobles gain when king john signed the magna carta?

The Great Council could approve taxes proposed by the monarch.

Explanation:

In 1216 ce, "The Magna Carta / The Charter of Rights" was signed by the King of England, John under the pressure from his own barons.

King John raised taxes in England to help the military in their fight against the French King. This increment in taxes angered the barons who asked for the King to declare a charter of rights. This charter, most commonly known as the Magna Carta, lists a number of laws for everyone, even the monarch. Among them was the right of the Great Council to approve any taxes proposed by the King. This charter gave certain rights to the nobles and also set limitations to the power of the king. And for any laws, the king had to consult with the Great Council before making decisions about raising taxes.

answer: decrease

a limiting factor is the one which decrease the abundance, distribution and causes extinction of the population of species in a ecosystem. here, predators including hawks, owls and snakes are the limiting factor for the population of mexican free tailed bat.   although bats are nocturnal animals as they forge for food at night these predators also may remain active during night which can decrease the population of the mexican free-tailed bats. also, these bats eat only one type of insects that are moths. the food can also be a limiting factor as all 400 members are dependent upon same type of food needs that are moths. the decrease in the moth population can cause decrease in population size of the mexican free-tailed bats.

therefore, the scenarios will most likely to decrease the population size of the mexican free-tailed bats.  

the answer to your question is tooth decay.