Answer:
Producing as many offsprings as possible so the chance of them living is higher.
Explanation:
difficulty in transporting hormones and waste products
D i did this before and this is the answer
Answer:
some kinetic energy to electric energy are good. for a hand cranked flash light it takes a lot of physical energy to get the light on for a large amount of time. LEDs are used because they are bright with even a little energy. solar/light energy is very useful aswell