These days, the biggest threats to it security are from

a. international drug cartels
b. terrorist organizations
c. "geeks" working on their own and motivated by the desire to gain some degree of notoriety
d. organized groups that have ample resources, including money and sophisticated tools, to support their efforts

The correct answer is D

Explanation:

IT security is a kind of security which involves a set of strategies of the cybersecurity which prevents unauthorized access to the business assets like data, networks and computers. It maintains the confidentiality as well as the integrity of the vital and the sensitive information. It blocks the access of  hackers.

So, the biggest threats to the security of It is the organized groups which have ample of the resources comprise of sophisticated tools and money in order to support the efforts.

ans.

heterothermic organisms include those organisms that can switch between homeothermic (having body temperature higher than environment) and poikilothermic (having variation in internal body temperature) strategies.

some migratory birds show heterothermy as they decrease their metabolic rate during cold nights to keep their body temperature low. drop in metabolic rate allows increase in production efficiency of birds that reduces the internal body temperature to make it equal to external cold temperature during cold nights.

thus, the correct answer is 'birds allow their temperature drop in order to increase their production efficiency.'