Essential services, such as water purification, nutrient cycling, and plant pollination are all examples of Earth's .Essential services, such as water purification, nutrient cycling, and plant pollination are all examples of Earth's .renewable resourcesresource basenonrenewable resourcesecosystem services

Ecosystem services.

Explanation:

Essential services, such as water purification, nutrient cycling, and plant pollination are all examples of Earth's ecosystem services.

An ecosystem can be defined as the natural living habitats of both living and non-living organisms.

Hence, this essential services that are being provided by the ecosystem are really very vital, important and useful for the sustenance of life, both for humans and enhances social welfare.

experiments.

surveys.

questionnaires.

interviews.

case studies.

participant and non-participant observation.

observational trials.

studies using the delphi method.

it´s related to his charming character.

beauty is not everything, although we can joke that girls only care about the physical or material aspect, the truth is that a real woman looks at more important things, besides intelligence and personality, there are other attitudes that make irresistible to men who are 'unattractive'.

for example develop your sense of humor.