An adjective is a word that describes something, using descriptive words such as, "rough", "smooth", or "pointy". For example, instead of just saying "taco", you could say "delicious taco" or "crunchy taco". Adjectives can also be used to describe culture, background, status, etc. So, the two adjectives in this sentence are "Italian" and "famously", being use to describe "astronomer" and "innovative"
Explanation: The question asks “What are red tides?” If you look at the 1st answer it gives you a description of what it does and how it negatively impacts the world, the 2nd tells you when it’s formed, the 3rd one explains how it’s formed and what it is and the 4th tell you in what place it’s likely to form