Question

1. why is only about 10% of usable energy transferred up to each trophic level of a food web? producers release a lot of their energy when oxygen escapes into the environment. decomposes are very inefficient at recycling energy and matter in ecosystems. consumers use up energy for body processes such as growth and movement, and much is lost as heat.

Explanation:

Energy transfer in a food web follows the 10% rule. Producers' energy loss isn't mainly from oxygen escape. Decomposers recycle matter but aren't the main reason for low energy transfer. Consumers use energy for life processes like growth and movement, and lose much as heat, which aligns with the 10% transfer.

Answer:

Consumers use up energy for body processes such as growth and movement, and much is lost as heat.