I NEED HELP ASAP I'LL MARK BRAINEIST What is the Sun powered by?

radiation

fossil fuels

convection

nuclear reactions

Which events are likely to be catastrophic to an ecosystem? select the three correct answers.a-hurricane.b-steady population growth.c-seasonal flooding.d-introducing of an aggressive invasive species.e-tsunami.

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

Which example describes a mutualistic relationship between organisms? young wasps prey on caterpillars. crabs eat the remains of dead fish. tapeworms feed on food in the intestines of cats ants protect a tree on which they feed.