Which type of organisms are primarily affected by pathogenic parasites?

Pathogenic parasites can infect a wide range of hosts, illustrating their adaptability and varied life cycles. They encompass organisms that thrive on or within other living hosts, drawing nutrients and often causing harm in the process.

Plants are known to be affected by a variety of parasitic organisms, such as certain nematodes, fungi, and viruses, which can impact their health and yield significantly.

Animals, including livestock and wildlife, are also susceptible to infections from various parasites, such as ticks, mites, and worms, which can influence their well-being and productivity.

Humans are another significant host for many parasites, including protozoa, helminths, and ectoparasites, leading to health problems and diseases.

Given that all these groups—plants, animals, and humans—can be impacted by pathogenic parasites, the notion that all of the above are affected is accurate. Each group encounters unique parasites specific to its biology and environment, demonstrating the widespread impact of parasitic organisms across the biological spectrum.