Which question cannot be answered by science? (4 points) a
Why do rainbows appear after rain storms?

b
Which plants grow in the desert?

c
Why should endangered animals be protected?

d
What is the hardest element on Earth?

i think one of them cannot be answred by science

C

Explanation:

The option C question has not a specific answer related to pure science.

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).