(Q).
Q: Over 90% of the energy we use comes originally from what? Choices: - earth - water - horizon - sun A:
(A).
sun

(Q).
Q: Why do mangrove trees rise high above the water? which characteristic help them to do so? Choices: - heavy roots - fat roots - no roots - stilt like roots A:
(A).
stilt like roots

(Q).
Q: What is the most important source of electromagnetic waves on earth? Choices: - cell phones - wireless networks - radios - the sun A:
(A).
the sun