The primary immune response is:

Low intensity and pathogen specific

 The correct answer is Option (1):  Low intensity and pathogen-specific.

The primary immune response refers to the initial immune response that occurs when the immune system encounters a specific pathogen for the first time. During the primary immune response, the immune system recognizes the pathogen as foreign and mounts a response to eliminate it. However, this initial response is relatively low in intensity compared to the subsequent secondary immune response.

The primary immune response is characterized by the activation and proliferation of B-lymphocytes and T-lymphocytes, which are specific to the encountered pathogen. B-lymphocytes produce antibodies that target the pathogen, while T-lymphocytes directly attack infected cells or assist in coordinating the immune response.

While the primary immune response is low in intensity, it plays a crucial role in initiating the immune response and establishing immunological memory. It primes the immune system for future encounters with the same pathogen, leading to a more rapid and robust secondary immune response. The secondary immune response, characterized by higher intensity and specificity, is responsible for providing stronger and more effective protection against recurrent infections.