Ecological footprint is the amount of needed to supply a person or an area with renewable resources and that are needed to absorb and recycle the wastes and pollution produced by such resource use.

a. solar energy
b. land and oxygen
c. nonrenewable resources
d. land and water
e. food and water

d. land and water

Explanation:

The services of an Ecosystem are the many and varied benefits that humans freely gain from the natural environment and from properly-functioning ecosystems. Such ecosystems include, for example, agroecosystems, forest ecosystems, grassland ecosystems and aquatic ecosystems. These ecosystems functioning properly provides such things like agricultural produce, timber, and aquatic organisms such as fishes and crabs. Collectively, these benefits are becoming known as 'ecosystem services', and are often integral to the provisioning of clean drinking water, the decomposition of wastes, and the natural pollination of crops and other plants.

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