Hi@akhtar,
You can use an aws_elb load balancer in your Terraform code. This provides an Elastic Load Balancer resource, also known as a "Classic Load Balancer". You can see the below code.
resource "aws_elb" "elb" {
  name               = "terraform-elb"
  availability_zones = ["us-west-2a", "us-west-2b", "us-west-2c"]
  listener {
    instance_port     = 8000
    instance_protocol = "http"
    lb_port           = 80
    lb_protocol       = "http"
  }
  health_check {
    healthy_threshold   = 2
    unhealthy_threshold = 2
    timeout             = 3
    target              = "HTTP:8000/"
    interval            = 30
  }
  instances                   = [aws_instance.foo.id]
  cross_zone_load_balancing   = true
  idle_timeout                = 400
  connection_draining         = true
  connection_draining_timeout = 400
  tags = {
    Name = "terraform-elb"
  }
}