Philosophy: (a) What is the main connective of the following sentence?

( ● )∨ ∼ ( ≡∼ (∨))

choices of answers

≡

∼

∨

●

(b) What is the main connective of the following sentence?

∼ ((● ∼ ) ⊃ (∼ ∨ ))

choices of answers

∼

●

∨

⊃

Answer asap 50 points which of the following illustrates how a venus fly trap senses that an insect has landed in its open leaves? 1. using tiny hairs, the leaves sense a change in light. 2. using tiny hairs, the leaves taste a chemical. 3. using tiny hairs, the leaves detect a touch. 4. using tiny hairs, the leaves sense a change in water levels.