Question

b) is this a thesis statement?
do increased crop production and pest resistance justify an increased use of genetically modified food crops?
c) yes no

Explanation:

A thesis statement is a clear, concise assertion of the main point or argument of an essay. The given sentence "Do increased crop production and pest resistance justify an increased use of genetically modified food crops?" is a question, not a statement. A thesis statement should make a claim, not ask a question.

Answer:

no