Name a reproductive strategy in which parasites take advantage of the care of other individuals of the same species or different species to raise their young.

The correct answer is Brood parasitism.

The question asks us to identify the reproductive strategy in which a parasite exploits the parental care of another individual — either of the same species or a different species — to raise its offspring. Let's go through this concept step by step.

Step 1: Understanding the Core Concept
In nature, raising offspring requires significant energy and resources. Some organisms have evolved a "shortcut" — instead of investing their own resources into raising young, they trick other individuals into doing the work for them. This is the fundamental idea behind brood parasitism.

Step 2: What is Brood Parasitism?
Brood parasitism is a reproductive strategy where one organism (the brood parasite) relies on another organism (the host) to incubate its eggs and raise its young. The parasite avoids the costs of parental care entirely by offloading that responsibility onto the host, which may be of the same species (intraspecific) or a different species (interspecific).

Step 3: How Does It Work?
The process typically follows these stages:

1. The brood parasite locates a host's nest.
2. The parasite lays its eggs in the host's nest, often removing or destroying one of the host's own eggs to avoid detection.
3. The host, tricked into believing the parasite's eggs are its own, incubates and hatches them.
4. After hatching, the parasite's chick may outcompete or eliminate the host's own offspring to monopolize all parental resources.
5. The host continues to feed and care for the parasite's young, often at great cost to its own reproductive success.

Step 4: Classic Example — The Common Cuckoo
The most well-known example is the Common Cuckoo (Cuculus canorus). Female cuckoos lay their eggs in the nests of smaller birds like reed warblers or dunnocks. The cuckoo egg often mimics the host's eggs in color and pattern. Once hatched, the cuckoo chick instinctively pushes all other eggs and chicks out of the nest, securing sole access to the host parents' care — even though the host birds are a completely different species.

Step 5: Why the Other Options Are Incorrect
• Sexual parasitism — This refers to a strategy (seen in deep-sea anglerfish) where a smaller male physically attaches to and depends on a female for survival and reproduction. It is not about raising young.
• Kleptoparasitism — This is the theft of food or resources (already caught or gathered) from another individual. It involves stealing, not parental care exploitation.
• Competitive parasitism — This is not a standard or recognized ecological term for a specific reproductive strategy.

Step 6: Summary
Brood parasitism is uniquely defined by the exploitation of parental care — the parasite does not steal food or compete directly, but instead manipulates another individual's instinct to nurture, using it as a free foster parent. This precisely matches the definition given in the question: "taking advantage of the care of other individuals of the same or different species to raise their young."

Therefore, the correct answer is unambiguously Brood parasitism.