The type of nutrition in which organisms take solid organic materials into their body is

Step 1: Analyze the question The question asks which type of nutrition involves taking solid organic food into the body (ingestion of solid food).

Step 2: Explain the concepts

• Parasitic: The organism lives on or in a host and gets nutrients from it, harming the host (e.g., tapeworm, mistletoe).
• Holozoic: The organism ingests solid organic food, digests it internally, absorbs the nutrients, and egests the waste (e.g., humans, dogs, amoeba).
• Saprophytic: The organism feeds on dead or decaying matter by secreting enzymes onto it and absorbing the dissolved nutrients (e.g., mushrooms, bread mould). It does not take in solid food.
• Symbiotic: Two different organisms live together in a close relationship that is beneficial to both (e.g., Rhizobium in the root nodules of legumes).

Step 3: Apply to the question Only holozoic nutrition involves taking in solid food through the mouth or cell membrane. This is followed by these stages:

1. Ingestion
2. Digestion
3. Absorption
4. Assimilation
5. Egestion

Step 4: Answer The correct option is B. holozoic.

Exam tip: Think "holo = whole." Holozoic organisms take in whole pieces of food. Saprophytes only absorb dissolved food, so remember "sapro = soaks up."