Question

read the sentence. henry david thoreau, often known as the father of environmentalism wrote the book entitled walden. which revision should be made so that the sentence is properly punctuated? place a dash after \environmentalism\ remove the comma after \thoreau\ place parentheses around \entitled walden\ add a comma after \environmentalism\

Explanation:

La frase tiene una descripción adicional ("often known as the father of environmentalism") que debe estar separada por comas. La coma antes de "environmentalism" ya está presente, pero falta la coma después para separar adecuadamente la descripción del resto de la frase.

Answer:

add a comma after "environmentalism"