Final answer:
Vegans need to carefully combine plant proteins to obtain all essential amino acids, as no single plant food typically provides all of these nutrients unlike animal-sourced proteins.
Step-by-step explanation:
Vegans, who do not consume any animal products, need to pay special attention to the protein they eat because it is more challenging to obtain all essential amino acids from single plant sources. Unlike animal proteins, which typically contain all the essential amino acids necessary for human health, plant proteins often lack one or more of these amino acids. This means that vegans must consume a variety of plant-based proteins throughout the day to ensure they receive a complete amino acid profile.
To answer the question, the correct option is:
- b. It is more difficult to obtain all essential amino acids from single plant sources.
Therefore, vegans must thoughtfully combine different plant foods such as grains, legumes, nuts, and seeds, which when eaten in combination, can provide a complete set of amino acids.