PED Special Education
SPED Sistema Público de Escrituração Digital (Portuguese: Public System of Digital Bookkeeping)
SPED Society of Piping Engineers and Designers
SPED Service Provider Edge Device
Answer:
The most common categories of natural resources are minerals (such as gold and tin) and energy resources (such as coal and oil). The air, forests and oceans can also be classified as natural resources.
Explanation:
Hm, its mineral.
Participle, because an infinitive is the basic form of a verb, a gerund is using 'ING', so participle is the last option.