Age of amphibians is__________.a. Carboniferousb. Ordovicianc. Devoniand. Cambrian

The correct answer is a. Carboniferous.

Explanation: Amphibians first appeared during the Devonian Period but reached their peak in diversity during the Carboniferous Period. The Carboniferous, which lasted from about 359 to 299 million years ago, is known as the "Age of Amphibians" because many amphibian species evolved and flourished during this time. It was a time of warm, humid climates with vast swampy forests, providing ideal conditions for amphibians. The Carboniferous period saw the development of the first large, fully terrestrial amphibians, marking a significant stage in the evolution of life on land.